Material Physics

1. material which can be drawn into wires
5. deformation which results in ‘permanent set’
6. rubber becomes very stiff prior to breaking as further extension requires an increase in bond ________
10. the point at which deformation becomes permanent (7,5)
11. process which increases the hardness of a material
13. process by which ductile materials fail
14. brittle materials are strong under ______________
15. measure of stiffness (6,7)
18. extension per unit length due to an applied stress
19. measure of the breaking strength of a material when under tension (8,7,6)
20. a material which only undergoes a small strain before failing is said to be __________.
21. process which increases the ductility of material
22. material with no regular internal structure

2. a name to describe the crystalline structure within metals
3. material comprising of long chain molecules
4. rubber is less stiff after its initial extension as further extension only requires the bonds to be ____________
7. feature with disrupts the motion of edge dislocations through a polycrystaline material (5,8)
8. prestressed glass
9. force per unit cross-sectional area when equal opposing forces act on a body
12. when a material is put under stress and the stress is then relaxed, the stress-strain graphs for increasing and decreasing stress do not coincide, but form a loop
14. method by which brittle materials fail (5,11)
15. the point at which no further stress (i.e. force) is required for a material to undergo continued extension
16. material which can be shaped or formed by pressure or hammering
17. deformation which is non-permanent