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← ScienceWhich outcome occurs when a metallurgical sample undergoes rapid quenching?
A)Increased residual stress is generated✓
B)Grain boundary diffusion is accelerated
C)Equilibrium phase transformation completes
D)Ductility proportionally increases linearly
💡 Explanation
Quenching introduces thermal shock; therefore, differential cooling rates induce plastic deformation by the martensitic transformation. Increased volumetric strain causes increased residual stress, because volume changes are constrained, rather than boundary diffusion dominating at elevated temperatures.
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