(Repeated) The best method for finding damage from sigma phase embrittlement is:
A.
Hardness testing
B.
Ductility testing
C.
Magnetic particle testing
D.
Metallographic testing
The Answer Is:
D
This question includes an explanation.
Explanation:
Same as above. Sigma phase formation is a microstructural phenomenon and not typically detected by NDE methods like magnetic particle or surface hardness testing.
Therefore, metallographic testing remains the definitive detection method, confirming option D again as the correct answer.
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