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65 Cards in this Set
- Front
- Back
Hardness |
Ability to resist abrasions, penetration, and distortion. |
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Brittleness |
Allows very little bending or shaping without shattering. |
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Malleability |
Ability to be hammered, molded, or shaped without cracking. |
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Ductility |
Ability to be bent permanently or twisted into various shapes without breaking |
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Elasticity |
Ability to return to its original shape after being deformed. |
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Toughness |
Ability to withstand tearing or shearing without breaking |
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Density |
Actual weight of a material per cubic inch |
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Fusibility |
Ability to become a liquid when heated. |
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Conductivity |
Ability to carry heat or electricity |
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Contraction |
Ability to shrink |
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Expansion |
Ability to grow larger |
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Tensile strength |
Resists being pulled apart |
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Compression strength |
Resists a crushing force |
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Shear strength |
Resists being cut by scissor-like action |
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Torsional strength |
Resists a twisting force |
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Strength to weight ratio |
The relationship between the strength of a material and its weight per cubic inch |
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Corrosion resistance |
Resists deterioration |
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Ferrous metals |
A group of metals having iron as their principal element |
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Types of ferrous metals |
Carbon steel Steel alloy |
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Nonferrous metals |
All metals, that have elements other than iron as their principal element. |
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1XXX designation |
Aluminum |
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2XXX through 8XXX |
aluminum alloys |
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Temper designation |
A letter and numbers following the alloy designation, which show the hardness of the metal. |
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Thickness |
Measured in thousandths of an inch and printed as a decimal |
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Clad coating |
A thin layer of pure aluminum that protects the base metal from corrosion. |
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Advantages of aluminum |
Light Easy to form |
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Disadvantages of aluminum |
Lacks strength in its pure state |
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Advantages of aluminum alloy |
Light Increased strength with added elements |
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Disadvantages of aluminum alloy |
Not easy to form with added elements |
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Titanium and titanium alloys advantages |
Good corrosion resistance Moderate strength Up to 800 degrees Fahrenheit Light in weight |
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Disadvantages of titanium and titanium alloys |
Loss of strength and becomes brittle at high temperatures above 800 degrees
Expensive |
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Magnesium and magnesium alloys advantages |
Very light Good forming characteristics High strength to weight ratios |
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Magnesium and magnesium alloys disadvantages |
Must be formed between the temperature of 450 degrees to 650 degrees, highly corrosive, unpredictable fire hazards |
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Visible lines |
Heavy unbroken lines that indicate the outer edges of an object |
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Hidden lines |
Medium lines with short, evenly spaced dashes that indicate the concealed edges |
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Centerlines |
Thin lines, made of long and short dashes, alternately spaced, consistent in length ( begins and end with dash ) |
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Dimension lines |
Thin lines ending with arrows that indicate the measured distance |
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Isometric drawings |
Give a 3 dimensional or pictorial view of an object |
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Orthographic drawing |
Shows the exact shape of an object through the use of different views |
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Basic views |
Front view Right side |
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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. |
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Alignment diagrams |
When an alignment check on an aircraft is performed |
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Station diagrams |
Orthographic views of fuselage, wing or empennage showing location of all structural components |
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Schematic diagrams |
Relation of parts within a system |
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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 |
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Circle |
Closed plane curve |
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Radius |
Center to outer edge |
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Circumference |
Around the outside circle |
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Arcs |
Incomplete circles compromised of less then 360 degrees |
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Tangent |
Point in where a straight line touches an arc or a circle but doesn't pass through |
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Parallel |
Equal in distance and length and don't touch |
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Bend tangent lines |
Indicates the beginning and end of a bend |
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Setback |
Distance from the bend tangent line to the mold point |
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Bend allowance |
The amount of metal used to make a bend or the distance between the the bend tangent lines |
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Bend radius |
The radius of a bend and is always measured to the inside |
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Cut line |
Always drawn with scribe |
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Scribe |
A sharp steel pick used for marking cut lines in metal |
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Combination square |
Used for measuring degrees of angles |
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Dividers |
Used for laying out arcs or circles on metals |
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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. |
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Blank |
Blank |
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Pencil compass |
Used when drawing arcs curves or circles when bisecting lines |
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Triangles |
Used for drawing vertical or diagonal lines 45 90 30 60 90 |
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Saber saw |
Used for slow cutting of irregular designs |
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Skin saw |
A mini hand held saw with a rotary disc blade that is adjustable |