Materials Flashcards
(28 cards)
What is tensile strength
The maximum tensile (pulling) load a material can support without breaking
What is compressive strength
The maximum compressive (squeezing) load a material can support without breaking
What is yield strength
The maximum load a material can support an still recover its original shape when the load is removed
What is elasticity
The ability of a material to recover its original shape after being stretched or compressed
What is ductility
The ability of a material to be permanently stretched without breaking
What is hardness
The ability of a material to resist indentation (dents) or abrasion (scratches and wear)
Malleability
The ability of a material to be shapes by pressing or hammering without cracking or breaking
Machinability
How easily a material can be machined (sawn, drilled, milled, turned)
Material cost
The cost of the material stock required to manufacture a component
Manufacturing cost
The cost of processing material stock into a finished component
Sustainability
The long term environmental and social impact of the extraction, processing and use of materials
What are ferrous metal alloys? Give 4 examples.
Ferrous metals are alloys that contain iron mixed with small amounts of other alloying elements that change their material properties.
Low carbon (mild) steel
High carbon (tool) steel
Cast iron
Stainless steel
Chromium
What are aluminium alloys
Aluminium alloys contain aluminium mixed with small amounts of other metals that change their material properties. They have a much lower tensile strength then even mild steel, but are around 3 times lighter
3 examples of aluminium alloys
Aluminium
Copper
Manganese
Silicon
Magnesium
Forms of supply for alumium alloys
Plate
Sheet
Round bar or rod
Square bar
Hexagon bar
Angle
Round tube
Rectangular tube
Channel
What are copper alloys
Copper alloys contain copper mixed with small amounts of other metals that change their material properties. Copper is good at conducting electricity, but aluminium is around 3 times lighter
3 examples of copper alloys
Copper
Cartridge brass
Phosphor bronze
How are brass and bronze alloys made
Brass alloy - zinc and copper
Bronze alloy - tin and copper
What are thermoplastic polymers used for
Thermoplastic polymers are used in a wide range of product due to their versatility, low cost and ease of manufacture
Give 5 examples of thermoplastic polymers
ABS
HIPS
Polycarbonate
Acrylic
PLA
How are thermoplastic polymers supplied?
In pellets or sheets
What are thermosetting polymers
Thermosetting polymers are formed via permanent chemical reactions and cannot be reshaped once moulded
4 examples of thermosetting polymers
Urea formaldehyde
Melamine formaldehyde
Epoxy resin
Polyester resin
What are ceramics? Give 2 examples
Ceramics are very hard and can be used as abrasive particles.
Silicon carbide
Tungsten carbide
