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186 Cards in this Set
- Front
- Back
The equation that relates the load to the stress is given by
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S = P/Ao = load/area
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The equation that relates te strain to the deformation is given by
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e = ΔL/Lo = deformation/gage length
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Hooke's Law is given by the equation
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S=Ee
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Fully-recoverable strain is called...strain
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elastic
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The two unit cell configurations that we will discuss in this class are
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bcc (body centered cubic) and fcc (face centered cubic)
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A material that creates a neck prior to fracture is called a .... material
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ductile
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a material that exhibits more than one phase is called either a .... or ... material
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allotropic or polymorphic
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The process whereby a material gains strength as it deforms is called....
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strain hardening
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Plastic strain is considered as
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non-recoverable
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the amount of energy that a material can absorb prior to fracture is called its
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toughness
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the maximum stress that a material can withstand is called the
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ultimate tensile strength (UTS)
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the basic building block of metals is called the
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unit cell
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deformation that occurs before reaching the yield strength is called ... deformation
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elastic
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one ksi is equal to
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1000 psi
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Tensile test properties are considered to be....properties
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macroscopic
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the slope of the linear portion of the stress-strain curve in the elastic region is called....
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elastic modulus or Young's modulus
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when elastic strain is recovered after deformation, this is called
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springback
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elastic strain is considered as
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fully recoverable
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the physical change in shape of a tensile specimen after exceeding its UTS is called
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necking
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when a material fails without creating a neck in the specimen, the sample is said to be a ... material
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brittle
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deformation that occurs between the yield strength and the ultimate tensile is....deformation
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plastic
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when unit cells are combined into a single unit, that unit is called a
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crystal
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the stress that separates the elastic from the plastic strain regions is called the
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yield strength
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a block of metal is made up of many
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grains
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Grains are in turn composed of many
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unit cells
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a steel called 8620 would have a carbon content of approximately
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.20%
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Attaching....the the name designates phases of a metal
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greek letters
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hardness is a measure of a material's resistance to
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surface indentation
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to change the properties of a material using heat, the process is called
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heat treatment
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cast iron is an alloy of iron and
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carbon
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a steel called 4140 would be considered as a (plain carbon or alloy) steel
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alloy
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the high temperature phase of iron is called
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austentite
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the lowest temperature that a particular composition of material will remain fully liquid lies on a line called the
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liquidus
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all iron-carbon mixtures less than 2.0% carbon are of the family called
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steel
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a preoload on the indenter is used with the ... hardness test
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Rockwell
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the indenter with a 1/16" hardened steel ball is used with the...hardness test
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Rockwell
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a steel called 4140 would be called a (low, medium, high) carbon steel
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medium
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iron with more than 2% cabron is called
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cast iron
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the uppermost line on an equilibrium phase diagram is called the
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liquidus
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the reaction where the material goes directly from a liquid to a solid without an intervening phase of liquid and solid is called the
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eutectic
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a 1010 steel would qualify as a (plain carbon, alloy) steel with a (low, medium, high) carbon content
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plain carbon, low
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the room temperature phase of iron is called
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ferrite
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gamma iron has the name
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austentite
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converting only the ferrite to austentite upon heating and then cooling back to ferrite and cementite is called
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full anneal
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steel is an alloy of iron and
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carbon
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when a material goes directly from one solid phase to another without a mixture of phases, it does so only at the .....reaction conditions
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eutectoid
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hardness test that uses the largest indenter ball
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brinell
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Cementite
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Fe3C
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Occurs at the composition that has the lowest possible heating point
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eutectic
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Ferrite, room temperature form of iron, is also called
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alpha iron
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Shaping the desired metal chemistry into semi-finished or finished shapes
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finishing
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steel is made up of
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iron and carbon
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All ferrite and Fe3Cis transformed to austentite upon heating and back to ferrite and Fe3C upon cooling
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normalizing
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A form of a material possessing a single characteristic structure. It is physically distinct, chemically homogenous, mechanically separable
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phase
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A steel designated as 1010 is considered as this
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plain carbon
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Changing the chemistry of the base metal by adding alloying elements to achieve specific properties
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refining
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removing the impurities from the ore to get to the base metal
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smelting
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The temperature below which the material will be fully solid is this
The lowest line on the phase diagram |
solidus
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Unit Cell Structure of austentite
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FCC
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Unit cell structure of ferrite
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BCC
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to make a hole in a casting, a mold feature called a...is required
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core
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to allow the easy removal of the pattern or casting from the mold, a mold feature called a ... is provided
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draft angle
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the vertical portion of the flow channel for a green sand casting is called the
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sprue
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the indication on the casting showing where the mold halves met is called the
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parting line
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the mold in a lost wax casting is considered as a ... mold
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unit (expendable)
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the green sand casting flask is composed of the following parts in order from top to bottom
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Cope
Drag Bottom Board |
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green sand consists of moisture in addition to....
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clay and sand
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the physical or virtual representation of the item you wish to cast is called hte
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pattern
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shell molding has a pattern that is considered as a ....pattern
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permanent
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EPS is used as a pattern material for the casting process called
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lost-foam casting
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the mold feature that allows air to escape from the cavity and provides a second source of molten metal is the
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riser
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the three allowances in casting pattern design are
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shrinkage, machining, distortion
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the pattern for green sand casting is considered as a .... pattern
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permanent
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the recess in the mold that holds the core in place is called the
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core print
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the mold material for an investment casting is made from
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ceramic
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the ceramic casting process that we discussed is called
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investment casting
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the pressure casting process where the material to be cast is melted at the casting machine is called
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hot chamber die casting
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The pressure casting process where the material to be cast is melted away from the casting machine
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cold chamber die casting
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all sand casting processes have a mold that is considered...(permanent or unit)
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unit
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the pattern for shell molding is considered as(permanent or unit)
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permanent
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the casting process where dry sand is used for the mold material is called
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lost-foam casting
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to make a hollow casting, a core is often used. Please name two casting processes that Do Not use a core to make a hollow casting.
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slush casting and centrifugal casting
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arrange the following processes in order of increasing minimm thickness for an allowable casting section by numbering 1 for the thinnest and 4 for the thickest.
die casting green sand casting investment casting permanent mold casting |
die casting 1
green sand casting 3 investment casting 2 permanent mold casting 4 |
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Name three different casting processes that are considered as sand casting processes
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shell molding, green sand casting, lost-foam casting
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Name three of the permanent mold casting processes
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cold chamber die casting
hot chamber die casting centrifugal casting |
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green sand consists of moisture plus
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clay and sand
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a cast iron pipie is made by the process called
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centrifugal casting
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The pattern material for evaporative casting is made from this
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EPS (Expanded Polystyyrene Foam)
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Lost foam casting, evaporative casting
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full mold casting
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The last mold feature that the liquid metal flows through before entering the mold cavity
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gate
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the process where a multipoint tool has each tooth cutting slightly depper than the tooth before it as the tool passes through the owkrpiece is called
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broaching
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the movement of the tool in boring is
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parallel to the axis of rotation
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the lathe process that decreases the outside diameter of a bar is called
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turning
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the controls for a lathe are located in the
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headstock
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to create a hole in drilling that is the correct size and direction, a process called...is used
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reaming
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the part of the lathe that rides on the ways and carries the cross-slide is the
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carriage
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the metal removal rate is measured in units of
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in3/min
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to square the end of a workpiece on a lathe, the process is called
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facing
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in horizontal milling, when the tool and workpiece are moving in opposite directions, the process is called
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conventional milling (up)
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a tool with flutes is used in the process called
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milling
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the controls for a lathe are located in the
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headstock
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the chip slides on the...of the tool
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rake face
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the broaching tool is considered as a ... tool
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multitooth
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the localized increase of a workpiece diameter in forging is called
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upsetting
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to make a hole in an extrusion, a ... must be fitted to the ram
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mandrel
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when plastic deformation of the workpiece takes place after heating the material to a temperature below the recrystallization temperature, the deformation is called
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warm working
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to make a thick sheet into a thin sheet, the process is called
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flat rolling
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the clearance to use in shearing metal is
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10% of metal thickness
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grain refinement brought about by hammers or rollers generates a product called
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wrought
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the forging process that uses a hammer and anvil is called
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open die forging
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when using the forging process with the tooling as rolls with grooves cut in them the process is called
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roll forging
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to make a channel from a bloom, the process is called
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shape rolling
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the four parts of the cut edge as indicated below are:
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rollover, burnish, fracture, burr
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the 3 deformation modes in sheet metal forming are called
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drawing, bending, and stretching
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when a desired circular part is cut from a large sheet, the process is called
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blanking
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the sheet metal process called....only takes place along a straight line
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bending
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the rotary process for bending sheet metal is called
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roll forming
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forcing a material through a die using compressive forces is called
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forward extrusion
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when a tube is forged between mating rolls to form a new shape for the tube walls, the process is called
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ring forging
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to make a cup from sheet metal, the process is called
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drawing
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in extrusion, when the material is forced around the punch and not though a die, the process is called
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backward extrusion
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the one sheet metal deformation process that deforms around the punch and not over the punch is called
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drawing
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when steam is used both to raise the forging hammer and to drive it against the workpiece, the process is called
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high energy rate forming
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to make a round disk to be used later from a rectangular sheet of metal, the process ... is used
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blanking
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when the forging process called .... is used to increase the diameter of the workpiece
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upsetting
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a pizza pan is an example of a drawing operation called
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shrink flanging
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cold working occurs at a temperature
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room temperature
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warm working occurs at a temperature
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below recrystallization temperature
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hot working occurs at a temperature
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above recrystallization
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material that undergoes grain refinement through hammering or rolling is called a
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wrought material
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a crescent wrench handle uses a form of forging called
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closed die
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a nail or a bolt uses a form of forging called .... to make the shape
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heading
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...metl metals use the process called melt atomization to make their powders
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low temperature
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in order, afte the powders are made, the processes necessary to accomplish making a P/M part are...
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blended, compacted, and sintered
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Compaction of the powders can achieve nearly 98+% of
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theoretical density
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high temperature melt metals use .. to make their powders
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spark atomization
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one advantage of using P/M is....
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high production rate
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one disadvantage of using P/M is
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material cost
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when determining what current and welding time in cycles to use for ERW, the diagram is called a ... diagram
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weld lobe
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when sound is used for welding energy, the process is called
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USW..Ultra sound welding
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three important factors for gas welding are flame...
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temperature, stand-off, and speed
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the joining process that uses a foreign metal that melts belor 450 degrees celsius is called
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soldering
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when the gas welding process uses a flame with the proper mixture of acetylene and oxygen, hte flame is called
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neutral
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adhesives cure under the following conditions
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elevated temperature, room temperature, anaerobic (no oxygen)
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two part adhesives are always of the type called
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thermoset
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the weld geometry for a t joint is a ...
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fillet weld
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the letters HAZ stand for
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heat affected zone
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the arc welding process that uses a bare, continuous, consumable electrode and flux to physically exclude the oxygen is called
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SAW
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the arc welding processe that uses a tungsten, nonconsumbale electrode is called
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GTAW
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the arc welding process that uses a bare, continuous, consumable electrode and a bottled shielding gas is called
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GMAW
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the welding process that uses the heat generated by electrical resistance is called
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ERW
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When acetylene is used as the fueld for welding, the process is called
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OFW oxyfuel welding
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when the gas welding process uses a flame with too much acetylene, the flame is
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carburizing
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when the gas welding process uses too much oxygen its
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oxidizing
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the strongest orientation for reinforcement in composites for strength is called
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unidirectional
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the weakest orientation for reinforcement in composites for strength is called
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random
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midrange orientation for reinforcement in composites for strength is called
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orthogonal
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the making of foamed polymers id done by the process called
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expansion
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the non-combinable form of a polymer molecule is called the
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monomer
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the combinable form of a polymer molecule is called the
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mer
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when a thermoplastic polymer is forced through a nozzle into a mold, the process is called
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injection molding
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three forms of a composite structure are
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particulate, laminar, and fiber
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pigments and fillers belong to the class of materials used as .... for polymers
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additives
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to make polymers, small molecules are combined to make large molecules in teh form of
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rings and chains
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a one-gallon plastic milk jug would be made by the process called
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blow molding
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a sheet of plastic would probably be made by the process called
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calandering
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when a thermoset polymer is injection molded, the process is called
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RIM
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the polymer forming process most like impression die forging is called
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compression molding
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plastic trash bags are often made by the process called
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blown film
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when a polymer product has a small circle and a short nib protruding from that circle, the product was made by the processs called
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injection molding
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the mickey mouse form that you made in lab was done by the process called
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vacuum forming
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vacuum forming must use a polymer of the...type
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thermoplastic
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transfer moldign uses a polymer of the
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thermoset type
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extrusion uses a polymer of the...
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thermoplastic type
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an extrusion is the intitial or preprocessor for the following polymer processes
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blow molding and blown film
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the form of polymer that can be softened due to heat without change in its chemical properties is called
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thermoplastic
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layers in refinforcement in a composite generate a composite called
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laminar composite
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putrusion is done using the polymer family called
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thermoset
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the form of polymer that can undergo large elastic strains without fracture is called the
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elastomer
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EPS is made by the process called
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expansion
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a home spa or jacuzzi is made by the process called
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spray up
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a composite pressure vessel would be made by the process called
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filament winding
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a skylight would be made by the process called
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free blowing
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a hollow thermoplastic or thermoset ball would be made by the process
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rotational molding
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a blisterpack for selling hardware, packing chewing gum, and pharmaceutical pills would be made by
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vacuum molding
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three processes that use compressed air in the process are
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blown film, blow molding, free blowing
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