manufacturing - material properties

Question 1

What is a Metal?

Answer 1

1. Usually alloys
2. Two or more elements, 1 metallic
3. Ferrous and non-ferrous

Question 2

What is a Ceramic?

Answer 2

1. Non-metallic
2. inorganic material
3. pottery, tiles, glass

Question 3

What is a Polymer?

Answer 3

1. Formed by repeating smaller structural units (monomers).
2. plastics, rubber, dna

Question 4

What is a Composite?

Answer 4

Two or more phases that are processes separately then bonded together to achieve new properties.

Question 5

What is a Thermoplastic?

Answer 5

Can be subject to multiple heating and cooling cycles

Question 6

What is a Thermosetting plastic?

Answer 6

• Once heated, will keep it’s shape
• Can’t be re-heated.

Question 7

What is an Elastomer?

Answer 7

Plastic that exhibits elastic behaviour.

Question 8

Name some Surface Processing Operations

Answer 8

1. Cleaning
2. Surface Treatment (sand blasting)
3. Coating (electroplating, painting)

Question 9

What is Strength?

Answer 9

ability of a material to withstand applied load without failure or deformation

Question 10

What is Ductility?

Answer 10

ability of a material to deform under stress without breaking.
sustains significant plastic deformation before fracture.

Question 11

What is Brittleness?

Answer 11

property of the material that causes it to fracture when subject to stress, with little to no plastic deformation before break.

Question 12

What is Toughness?

Answer 12

ability of a material to absorb energy and deform without fracturing.

Question 13

What is Hardness?

Answer 13

ability of a material to resist localised permanent deformation
- indents
-scratches

Question 14

What is Fatigue?

Answer 14

• Fracture due to cyclic (repeated) stresses.
• Can alternate between tension and compression stress.
• Small cracks, medium cracks weaken structure,

Question 15

What is Creep?

Answer 15

• Slow plastic deformation of a material under constant stress
• Can occur at any temperature - Over X time

Question 16

What is Castabability?

Answer 16

East with which a metal can be cast - The ability of a metal to fill all cavities of a mold.

Question 17

What is Machinability?

Answer 17

Ease of which a metal can be shaped by cutting tools.

Question 18

What is Weldability?

Answer 18

Ease of which separate elements can be joined together under the action of local heating.

Question 19

What is Workability? Name some applications where LOW Workability may be desired.

Answer 19

Ease of which a material can be manipulated of changed into a new shape.
Affected by:
- Ductility
- Hardness
-Strength
-Grain Size

Low Workability Applications:
-High Temp Applications
- Machining Operations
- Forming Operations.

Question 20

What is Smelting?

Answer 20

-process of applying heat to melt down a material to molten stage.

Question 21

PETG Properties:
Printability: __________
Heat resistance: __________
Tensile strength: ___________
Toughness: ___________

Answer 21

Printability: GOOD
Heat resistance: AVERAGE
Tensile strength: GOOD
Toughness: GOOD

Question 22

PLA Properties:
Printability: __________
Heat resistance: __________
Tensile strength: ___________
Toughness: ___________

Answer 22

Printability: EXCELLENT
Heat resistance: POO
Tensile strength: EXCELLENT
Toughness: POO

Question 23

TPU Properties:
Printability: __________
Heat resistance: __________
Tensile strength: ___________
Toughness: ___________

Answer 23

Printability: AVERAGE
Heat resistance: AVERAGE
Tensile strength: AVERAGE
Toughness: EXCELLENT

Question 24

ABS Properties:
Printability: __________
Heat resistance: __________
Tensile strength: ___________
Toughness: ___________

Answer 24

Printability: AVERAGE
Heat resistance: GOOD
Tensile strength: GOOD
Toughness: GOOD

Question 25

What is Annealing?

Answer 25

- Heating a material up pass its recrystalise temp (but lower than melting) - rapidly cooling increases hardness

Question 26

what are the properties of aluminium?

Answer 26

- light - high strength -low corrosion - lower density than titanium

Question 27

what are some properties of titanium?

Answer 27

- light - high strength -low corrosion - high temp resistance

Question 28

what are some properties of copper?

Answer 28

- soft / malleable - ductile - high temp conductivity - high electrical conductivity

Question 29

what are some properties of brass and bronze?

Answer 29

brass: - copper and zinc - high hardness - good workability bronze: - copper and tin -stronger -dense - conductive

Question 30

what are some properties of zinc?

Answer 30

- brittle - often used as alloy to prevent rusting - tarnishes in air

Question 31

what are some properties of magnesium?

Answer 31

- light - high strength - weight ratio -cheap - great machinability

Question 32

what are some properties of lead?

Answer 32

-soft -ductile -malleable - low melting point

Question 33

what are some properties of ABS?

Answer 33

-durable -tough - moderate heat resistance

Question 34

what are some properties of PLA?

Answer 34

- brittle at low temps - biodegradable -

Question 35

what are some properties of TPU?

Answer 35

- flexible - high strength - high ductility - high durability

Question 36

what are some properties of PETG?

Answer 36

-tough -impact resistant -relatively flexible -

Question 37

what are the differences between High carbon Steel and Low carbon Steel?

Answer 37

HCS: stronger (high carbon), better hardness, LCS: more ductile, tougher, more weldable (low carbon)