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← ScienceWhich risk increases during rapid quenching of crystalline steel?
A)Martensite formation, high hardness✓
B)Austenite retention, low ductility
C)Ferrite precipitation, grain growth
D)Bainite transformation, reduced toughness
💡 Explanation
Rapid quenching causes martensite formation rather than other phases because of the diffusionless transformation during which carbon atoms get trapped within the crystal lattice. Because martensite is very hard and brittle, the procedure introduces the risk of cracking during use; therefore, tempering to reduce internal stresses is often required.
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