Mechanical Behaviour and Testing of Materials Practice Test 3

1. Burgers vector is a measure of the lattice distortion due to the presence of ____

2. The screw dislocation in which the atomic displacement occurs in the forward direction is a counterclockwise dislocation.

3. Inclusions don’t affect formability of materials.

4. From annihilation of dislocations, total energy of system _____

5. What is the range of theoretical shear strength of ductile metals?

6. Screw dislocation line moves ______ to applied stress.

7. a/6[1 2 1] + a/6[1 2 1] → _______

8. A dislocation can avoid obstacles by a glide.

9. Mechanical properties of single phase alloys cannot be improved by ____________

10. What is the angle between applied stress and mixed dislocation line?