Mechanical Metallurgy Practice Test 2

1. The following diagram represents the equation σ₁²+σ₃² - σ₁σ₃ = σ_o² for the von-mises condition.
The plot is known as the yield locus for Von-Mises criteria. Which of the following statement is not correct?

2. If the plane strain deformation is occurring parallel to the XY plane, then strain in the z-direction is equal to zero. The stress in the z-direction will be equal to _______________
(Given that stress in x and y-direction is σ_x andσ_y respectively).

3. Which of the following represents the extrinsic stacking fault in the FCC Metal?

4. In the following diagram, the green ellipse shows the yielding criteria according to von-mises for isotropic material. What does the red ellipse represent?

5. The dislocation of low mobility that is produced by a dislocation reaction is called a ______ dislocation.

6. Which of the following phenomena is not associated with dislocation?

7. The family of crystallographic equivalent directions for [1,0,0] is denoted as __________

8. Determine the angle between the [110] axis of a copper crystal with (11-1)[0-11] slip system?

9. Among the given metal, which has the highest stacking fault energy?

10. Integers indicate crystallographic directions in brackets: [u v w]. Reciprocals are not used in determining directions.