Mechanical Behaviour Basic Test – 3

1. Which statement is false?

2. Most crystalline materials have dislocations in their as formed state.

3. The number of dislocations increases drastically during ______

4. Positive edge dislocation is denoted by ______

5. Dislocation density can vary from _____ to _____ in metals.

6. Edge dislocation introduces shear strain only.

7. Which one of the following, is a line imperfection?

8. What term is used for the defect, produced by an array of dislocations that produces a small difference in orientation between the adjoining lattices?

9. Dislocations are responsible for ________________

10. What is the range of dislocation density in pure and unhardened metals?

11. Large plastic deformation corresponds to _____ of grains along the direction of applied stress.

12. What is unit of dislocation density?