Topic 2 Flashcards
(50 cards)
What are 5 properties of metals?
- good conductors
- not transparent
- lustrous
- strong yet deformable
- durable
What are 4 properties of ceramics?
- good insulators
- resistant to high temperatures and harsh environments
- hard
- brittle
what are 3 properties of polymers?
- low density
- flexible
- durable
What are the 9 mechanical material properties?
- strength
- stiffness
- toughness
- elasticity
- plasticity
- ductility
- brittleness
- hardness
- wear resistance
What is brittleness?
when a material breaks with little or no deformation
What are 2 materials that are brittle?
- glass
- acrylics
What is compressive strength?
a measure of the maximum crushing stress a material can endure before failure
What are 3 materials with high compressive strength?
- steels
- concrete
- ceramics
What is ductility?
the ability of a material to be permanently deformed without breaking
What are 2 materials that are ductile?
- aluminium
- mild steel
What are 3 materials that are hard?
- high carbon steel
- glass
- concrete
What is stiffness?
A measure of a materials ability to resist elastic deformation
What are 3 materials that are stiff?
- high carbon steel
- ceramics
- glass
What is tensile strength?
A measure of the maximum pulling stress a material can endure before failure
What are 2 materials with high tensile strength?
- steels
- fibreglass
What is toughness?
the ability of a material to withstand shock or impact, absorb energy and plastically deform without fracturing
What are 3 materials that are tough?
- low carbon steel
- nickel
- rubber
Up until what point is stress proportional to strain on the stress vs strain graph?
proportional limit
what does the yield point indicate?
the limit of elastic behaviour and the beginning of plastic behaviour
in materials, the crystals that form in liquid during freezing are called…?
dendrites
if a microstructure from a binary isomorphous phase diagram has 32% solid nickel. What percent of solid is copper?
68%
When does the output of an AND gate 1?
when both inputs=1
When does the output of a NAND gate 1?
Every time except for when both inputs=1
When does the output of an OR gate = 1?
Every time except for when both inputs=0
