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← TechnologyWhich dimensional shift arises when quenching a high-carbon steel forging?
A)Martensitic transformation volume increase✓
B)Austenite grain boundary segregation
C)Ferrite phase precipitation reduction
D)Cementite allotropic phase formation
💡 Explanation
Quenching causes a martensitic transformation with a volume increase because carbon atoms trapped distort the lattice, therefore increasing dimensions. This expansion is the martensite formation, rather than reductions in other phases during tempering post-quench.
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