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65 Cards in this Set

  • Front
  • Back

Hardness

Ability to resist abrasions, penetration, and distortion.

Brittleness

Allows very little bending or shaping without shattering.

Malleability

Ability to be hammered, molded, or shaped without cracking.

Ductility

Ability to be bent permanently or twisted into various shapes without breaking

Elasticity

Ability to return to its original shape after being deformed.

Toughness

Ability to withstand tearing or shearing without breaking

Density

Actual weight of a material per cubic inch

Fusibility

Ability to become a liquid when heated.

Conductivity

Ability to carry heat or electricity

Contraction

Ability to shrink

Expansion

Ability to grow larger

Tensile strength

Resists being pulled apart

Compression strength

Resists a crushing force

Shear strength

Resists being cut by scissor-like action

Torsional strength

Resists a twisting force

Strength to weight ratio

The relationship between the strength of a material and its weight per cubic inch

Corrosion resistance

Resists deterioration

Ferrous metals

A group of metals having iron as their principal element

Types of ferrous metals

Carbon steel


Steel alloy

Nonferrous metals

All metals, that have elements other than iron as their principal element.

1XXX designation

Aluminum

2XXX through 8XXX

aluminum alloys

Temper designation

A letter and numbers following the alloy designation, which show the hardness of the metal.

Thickness

Measured in thousandths of an inch and printed as a decimal

Clad coating

A thin layer of pure aluminum that protects the base metal from corrosion.

Advantages of aluminum

Light


Easy to form

Disadvantages of aluminum

Lacks strength in its pure state

Advantages of aluminum alloy

Light


Increased strength with added elements

Disadvantages of aluminum alloy

Not easy to form with added elements

Titanium and titanium alloys advantages

Good corrosion resistance


Moderate strength


Up to 800 degrees Fahrenheit


Light in weight

Disadvantages of titanium and titanium alloys

Loss of strength and becomes brittle at high temperatures above 800 degrees



Expensive

Magnesium and magnesium alloys advantages

Very light


Good forming characteristics


High strength to weight ratios

Magnesium and magnesium alloys disadvantages

Must be formed between the temperature of 450 degrees to 650 degrees, highly corrosive, unpredictable fire hazards

Visible lines

Heavy unbroken lines that indicate the outer edges of an object

Hidden lines

Medium lines with short, evenly spaced dashes that indicate the concealed edges

Centerlines

Thin lines, made of long and short dashes, alternately spaced, consistent in length ( begins and end with dash )

Dimension lines

Thin lines ending with arrows that indicate the measured distance

Isometric drawings

Give a 3 dimensional or pictorial view of an object

Orthographic drawing

Shows the exact shape of an object through the use of different views

Basic views

Front view


Right side

Special views

Auxiliary- shows the true shape and length of an object



Sectional- clarify hidden or internal features



Phantom- shows alternate position of a part or missing part ( light switch )



Exploded- show relative location of parts.

Alignment diagrams

When an alignment check on an aircraft is performed

Station diagrams

Orthographic views of fuselage, wing or empennage showing location of all structural components

Schematic diagrams

Relation of parts within a system

Flat pattern layout

Drawing of an object that's been rolled, folded, or a combination of both, then spread out on a plane or flat surface

Circle

Closed plane curve

Radius

Center to outer edge

Circumference

Around the outside circle

Arcs

Incomplete circles compromised of less then 360 degrees

Tangent

Point in where a straight line touches an arc or a circle but doesn't pass through

Parallel

Equal in distance and length and don't touch

Bend tangent lines

Indicates the beginning and end of a bend

Setback

Distance from the bend tangent line to the mold point

Bend allowance

The amount of metal used to make a bend or the distance between the the bend tangent lines

Bend radius

The radius of a bend and is always measured to the inside

Cut line

Always drawn with scribe

Scribe

A sharp steel pick used for marking cut lines in metal

Combination square

Used for measuring degrees of angles

Dividers

Used for laying out arcs or circles on metals

Punches

Prick punch- used for reference marks


Center punch- used to mark hole locations for drilling


Drift punch-used to finish driving out a bolt pin or river from a hole.

Blank

Blank

Pencil compass

Used when drawing arcs curves or circles when bisecting lines

Triangles

Used for drawing vertical or diagonal lines


45 90


30 60 90

Saber saw

Used for slow cutting of irregular designs

Skin saw

A mini hand held saw with a rotary disc blade that is adjustable