Question

Two metals, A and B, have Stacking Fault Energies of $20\text{ mJ/m}^2$ and $160\text{ mJ/m}^2$ respectively. Which of the following is true regarding their deformation behaviour?

• A. Metal A will cross-slip more easily than Metal B.
• B. Metal B will exhibit a higher rate of work hardening than Metal A.
• C. Metal B will cross-slip more easily than Metal A.
• D. Metal A will not exhibit any plastic deformation.

Hint:

High SFE (e.g., Aluminum) $\rightarrow$ Easy cross-slip $\rightarrow$ Low work hardening rate.
Low SFE (e.g., Brass, Stainless Steel) $\rightarrow$ Difficult cross-slip $\rightarrow$ High work hardening rate.

Answer 1

The Correct Option is C