Question:
Which of the following metal has low stacking fault energy?
Which of the following metal has low stacking fault energy?
Show Hint
Low stacking fault energy promotes twinning and planar slip.
Updated On: Jun 29, 2026
- Gold
- Silver
- Copper
- Nickel
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The Correct Option is D
Solution and Explanation
Concept:
Stacking Fault Energy (SFE) is the energy required to introduce a stacking fault in the crystal structure.
It strongly influences:
• dislocation splitting
• cross-slip ability
• deformation behavior Low SFE materials:
• show wider partial dislocations
• favor twinning
Step 1: Typical SFE trend in FCC metals.
\[ Ni < Cu < Ag < Au \quad (\text{approximate trend}) \] Nickel has relatively lower stacking fault energy compared to Cu, Ag, and Au in many engineering contexts.
Step 2: Physical interpretation.
Low SFE means:
• difficulty in cross slip
• planar slip behavior
• higher work hardening tendency Nickel shows such characteristics compared to others in the list. Final Answer: \[ \boxed{\text{Nickel}} \]
• dislocation splitting
• cross-slip ability
• deformation behavior Low SFE materials:
• show wider partial dislocations
• favor twinning
Step 1: Typical SFE trend in FCC metals.
\[ Ni < Cu < Ag < Au \quad (\text{approximate trend}) \] Nickel has relatively lower stacking fault energy compared to Cu, Ag, and Au in many engineering contexts.
Step 2: Physical interpretation.
Low SFE means:
• difficulty in cross slip
• planar slip behavior
• higher work hardening tendency Nickel shows such characteristics compared to others in the list. Final Answer: \[ \boxed{\text{Nickel}} \]
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