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← ScienceWhich consequence results when rapid cooling during steel quenching triggers martensite formation?
A)Increased hardness and brittle nature✓
B)Enhanced ductility and tensile strength
C)Shift toward equilibrium phase transition
D)Decreased resistance against corrosion cracking
💡 Explanation
Martensite formation increases hardness and brittleness because rapid quenching causes _diffusionless transformation_, impeding atom rearrangement; therefore, steel becomes hard, rather than ductile, and is prone to fracture rather than corrosion-resistant.
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