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← ScienceDuring rapid cooling of molten steel, which consequence increases because of rapid phase transition?
A)Formation of brittle martensite phases✓
B)Increased resistance to plastic deformation
C)Precipitation of equilibrium ferrite grains
D)Enhanced austenitic grain boundary segregation
💡 Explanation
Rapid cooling promotes the diffusionless transformation called martensitic transformation, because atoms don't have time rearrange into equilibrium phases. Therefore, brittle martensite forms rather than softer phases precipitate because the austenite's crystal structure changes.
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