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← ScienceWhich consequence results when a metallurgical rapid cooling process (quenching) exceeds threshold?
A)Martensite grains form with dislocations✓
B)Austenite phase is thermodynamically stabilized
C)Ferrite precipitates embrittle grain boundaries
D)Cementite prevents dislocation propagation
💡 Explanation
Excessive quenching causes rapid cooling to introduce lattice strain, resulting in martensitic transformation. Displacive transformation occurs because atoms shift collectively, therefore martensite crystals generate dislocations, rather than thermodynamically stable phases at equilibrium.
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