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ATAR Engineering > Materials Properties > Flashcards

Materials Properties Flashcards

1
Q

What are the 2 Non-Ferrous Alloys?

A

Brass and Solder

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2
Q

What are the 4 Pure Metals?

A

Aluminium, Copper, Zinc and Iron

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3
Q

What are the 4 Ferrous Alloys?

A

Cast iron, Mild Steel, Medium/High Carbon Steel, and Stainless Steel

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4
Q

What are the 5 Polymers?

A

Polypropylene, Polycarbonate, Acrylics, ABS and Nylon

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5
Q

What are the 2 Composites?

A

Concrete and Reinforced Concrete

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6
Q

What is the definition of STRENGTH?

A

The ability of a material to resist a force.

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7
Q

What is the definition of ELASTICITY?

A

The ability of a material to return to its original shape or length once an applied load or force has been removed.

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8
Q

What is the definition of PLASTICITY?

A

The ability of a material to change its shape or length under a load and stay deformed even when the load is removed.

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9
Q

What is the definition of DUCTILITY?

A

The ability of a material to be stretched without fracturing and be formed into shapes such as very thin sheets or very thin wire.

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10
Q

What is the definition of BRITTLENESS?

A

The property of being easily cracked, snapped or broken. Opposite of ductility and has little plasticity.

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11
Q

What is the definition of MALLEABILITY?

A

The ability of a material to be shaped, worked or formed without fracturing. Closely related to plasticity.

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12
Q

What is the definition of TOUGHNESS?

A

The energy absorbed by a material without fracturing and measured by the are under the stress-strain graph up to the point of failure.

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13
Q

What is the definition of HARDNESS?

A

The ability to resist erosion or surface wear.

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14
Q

What is the definition of RESILIANCE?

A

The energy absorbed by a material within its linearly elastic range and measured by the area under the stress-strain graph up to the yield point.

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15
Q

What is the definition of DENSITY?

A

A measure of how heavy an object is for a given size. i.e. the mass of a material per unit of volume.

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16
Q

What is the definition of CORROSION RESISTANCE?

A

How well a substance can withstand damage caused by oxidization or other chemical reactions.

17
Q

What is the definition of ELECTRICAL CONDUCTIVITY?

A

Determines how well a given material will conduct electricity.

18
Q

What is the definition of THERMAL CONDUCTIVITY?

A

The intrinsic ability of a material to transfer or conduct heat.

19
Q

What is HARDENING?

What are the changes in the properties?

A

Hardening: where the material is heated to a certain temperature (CT) and soaked completely, then quenched.
This increases the hardness, strength and brittleness.

20
Q

What is CASE HARDENING?

What are the changes in the properties?

A

Case Hardening: similar to hardening except only the outer layer is heated and a certain amount of carbon is infused while the inside remains original.
Increases hardness, strength and brittleness however in different amounts.

21
Q

What is TEMPERING?

What are the changes in properties?

A

Tempering: Heating to a CT usually lower than hardening, and left to air cool.
This relieves the internal stresses from hardening and reduces brittleness.

22
Q

What is ANNEALING?

What are the changes in properties?

A

Annealing: Heated to a CT for a length of time and then cooled in different ways depending on the material.
This softens the material and increases ductility

23
Q

What is NORMALIZING?

What are the changes in properties?

A

Normalizing: Heating the material to a temperature higher than hardening and air cooling before the hardening process.
This increases the hardness, strength and toughness.

24
Q

Describe COLD DRAWN?
What properties are altered?
What are the uses?

A

Cold Drawn: Room temperature bar or coil being drawn through a die reducing the cross section of the original bar.
This increases UTS, Yield Stress and brittleness but decreases the toughness.
Uses = Tubes, Wires, Bars and Sheet metal

25
Q

Describe BRIGHT DRAWN?
What properties are altered?
What are the uses?

A

Bright Drawn: Same as cold drawn but heated up.
Scale free surface.
Uses = Round, Square or Hexagonal Bars

26
Q

Describe CASTING?
What properties are altered?
What are the uses?

A

Casting: Fills a mould with molten metal, cooled, removed from mould.
Not Ductile or Tough, need to be heat treated to be machined
Uses = Engine Cylinder Blocks, Mining Machinery, Gears.

27
Q

Describe FORGING?
What properties are altered?
What are the uses?

A

Forging: Applying compressive forces to a piece to deform it and create a desired geometric change to the metal.
Increases strength, not limited to iron and steel.
Uses = Automotive components, Agricultural equipment, hand tools and hardware.

28
Q

Describe PRESSING?
What properties are altered?
What are the uses?

A

Pressing: Flat sheet metal into a stamping press where a tool and a die surface forms the metal into a net shape.
Uses = Aerospace, Medical, Construction, Automotive, Commercial, Electronics, Marine, Agriculture.

ATAR Engineering (1 decks)

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