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54 Cards in this Set
- Front
- Back
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strategic vectors of sustainability
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environmental (x)
social (y) economical (z) |
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development that meets the needs of the present without compromising the ability of future generations to meet their own needs
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sustainability
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factors of non-sustainability
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the great unraveling
the great warming the great inequities |
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If on average we are bruning 1.5 earths a year, how much does the US use alone?
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average 3 earths a year in the US alone
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dissolution of metal in an aqueous environment through an electro-chemical cell
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electrolysis
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Cathode
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Negative
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Anode
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Positive
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Corrosion _______ as you go down in electrical potential
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corrosion INCREASES as you go down in electrical potential
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what is the predominant alloying element in all of the stainless steels?
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Chromium
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noble metals
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copper
gold platinum silver |
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which one of the metallic elements is the most abundant on earth?
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aluminum
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The strength and hardness of steel increases as carbon content ______
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INCREASES
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Plain carbon steels are designated in the AISI code system by which notation?
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10XX
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which element is the most important alloying ingredient in steel?
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Carbon
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Which of the following is the not a common alloying ingredient in steel?
chromium, manganese, nickel, zinc |
Zinc
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which is the most important cast iron commercially?
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gray
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which metal is noted for its good electrical conductivity?
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copper
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Brass is an alloy of what two metallic elements?
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Copper & Zinc
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Metals based on iron:
include steel and cast iron |
Ferrous
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all other metals (aluminum, copper, lead, gold..)
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Nonferrous
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the ability to be scratched
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hardness
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an alloy in which one element is dissolved in another to form a single-phase structure
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Solid Solution
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homogeneous mass of material in which the grains all have the save crystal structure
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phase
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graphical representation of the phases of a metal alloy system as a function of composition and temperature
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phase diagram
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phase diagram for an alloy system of two elements at atmospheric pressure defines the solubility of one element in another
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binary phase diagram
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Solidus and Liquidus are at the same temperature
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Eutectic alloy
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melting point of the eutectic composition (always the lowest melting point for an alloy system)
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Eutectic point
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lowest temperature for liquid phase
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eutectic point
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lowest temperature for solid-solid phase
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eutectoid point
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4 Steel Types
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Plain Carbon
Tool Steel Low Alloy Steel Stainless Steel |
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4 Types of Cast Iron
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Grey
White Ductile Malleable |
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heating and soaking metal @ suitable temperature for a certain time period and then slowly cooling
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annealing
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heating and soaking alloys, slow cooling ferrous materials
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Full annealing
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similar heating and cooling at faster rates to create pearlite
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normalizing
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annealing to reduce work hardening
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recrystallization
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heat treatment that precipitates fine particles that block the movement of dislocations and strengthen + harden
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precipitation hardening
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thermochemical treatments applied to steels in which the composition of the part surface is altered by adding various elements
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surface hardening
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treating steel in a carbon rich
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carburizing
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treating steel in nitrogen rich
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nitriding
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two basic categories of casting processes
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expendable
permanent |
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metal supports of various designs used to hold the core in place in the sand mold
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chaplet
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most common metals used in die casting
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zinc, tin, lead, aluminum, brass, magnesium
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ionized solution in an electrolytic cell
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electrolyte
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which is the most widely used casting process?
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sand casting
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in sand casting, the volumetric size of the pattern is ________ than the cast part
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BIGGER THAN
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SiO2
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Silica
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A mold in which moisture is contained
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green mold
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expendable molds
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investment
sand casting shell molding vacuum molding |
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casting process in which the mold is a thin shell of sand bonded by a thermosetting resin
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shell molding
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Lost wax process
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investment casting
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permanent mold operations
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centrifugal casting
die casting slush casting |
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a defect that occurs when metal solidifies before filling the cavity
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misrun
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which is the most important casting metals commercially?
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cast iron
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hollow cast
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slush casting
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