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Engineering > Materials > Flashcards

Materials Flashcards

1
Q

What is the eutectic temperature of Lead-Tin?

A

183 degrees Celsius

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2
Q

What weight percent is the eutectic point of Lead-Tin?

A

62% Sn

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3
Q

What is the eutectic temperature of Iron-Carbon?

A

1147 degrees

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4
Q

What is the weight percent of the eutectic point for Iron-Carbon?

A

4.3%

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5
Q

What percent does an Iron-Carbon phase diagram go to?

A

6.67%

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6
Q

What is the eutectoid temperature of Iron-Carbon?

A

723 degrees

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7
Q

What is the eutectoid percent for Iron-Carbon?

A

0.83%

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8
Q

Low carbon carbon percentage

A

0.07% - 0.15%

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9
Q

Mild carbon percentage

A

0.15% - 0.30%

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10
Q

Medium carbon percentage

A

0.30% - 0.60%

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11
Q

High carbon percentage

A

0.60% - 1.25%

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12
Q

Ultra-high carbon percentage

A

1.25% - 2%

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13
Q

Applications of low carbon steels

A

auto body parts and wire products

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14
Q

Applications of mild carbon steels

A

structural plates and sections, stampings, forgings, seamless tubes, and boiler plates

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15
Q

Applications of medium carbon steels

A

forgings and automotive components (chassis), including shafts, axles, gears, crankshafts

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16
Q

What are 0.4% - 0.6% carbon steels used for

A

trains rails, wheels and axles

17
Q

Applications of high carbon steels

A

high-strength spring materials and wires, cutting tools, punches, dies, and industrial knives

18
Q

Applications of ultra-high carbon steels

A

highly tempered non-industrial knives, punches and axles

19
Q

What steels are weldable?

A

> 0.30% carbon

20
Q

What are the 6 types of thermoplastics?

A

polyethylene, polypropylene, acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), polyvinyl chloride (PVC), nylon

21
Q

Mechanical properties of polyethylene

A

chemical resistance
impact resistance
stable in cryogenic environments

22
Q

Mechanical properties of polypropylene

A

translucent
chemical resistance
tough
durability
heat resistance

23
Q

Mechanical properties of ABS

A

rigid
impact resistance
insulating properties
abrasion and strain resistance
mechanically strong and stable over time
poor UV resistance

24
Q

Mechanical properties of PLA

A

biodegradable
weldability
chemical resistance
low heat resistance
low strength
difficult to machine

25
Q

Mechanical properties of uPVC

A

unplasticised PVC
rigid
UV resistance
chemical resistance higher UTS
durable

26
Q

Mechanical properties of PVC

A

less rigid
high impact strength
easier to mould
lower temp resistance
less resistant to chemicals
lower UTS

27
Q

Mechanical properties of Nylon

A

lustrous
elasticity
very strong
chemical resistance
quick drying
temp resistance
high UTS

28
Q

Uses for LDPE

A

plastic containers/ bottles
cable insulation
crinkly plastic bags (lego pieces bag)

29
Q

Uses for HDPE

A

water pipes
reusable plastic bags
milk bottles
chemical containers

30
Q

Uses for polypropylene

A

plastic containers
reusable water bottles
laboratory components
outdoor furniture
luggage
car parts

31
Q

Uses for ABS

A

auto parts (dashes, bumpers)
household electronics
electrical appliances
3D printing materials
power tool housing

32
Q

Uses for PLA

A

car interiors
medical implants
3D printing filament
cutlery and food containers

33
Q

Uses for uPVC

A

window/door frames
gutters and other piping
flooring

34
Q

Uses for PVC

A

car parts
electronic and electrical equipment (wire insulation)

35
Q

Uses for Nylon

A

gears
rollers
bearings
waterproof rope
clothing

36
Q

How do you answer a long response question on certain composition steel?

A

correct sketch (1)
identifies correct composition percent (1)
3 uses based on 3 mechanical properties (3)

Engineering (3 decks)

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