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← ScienceWhich consequence results when exceeding austenite finish temperature?
A)Complete martensite transformation occurs
B)Retained austenite volume increases
C)Pearlite formation rate increases
D)Full ferrite-cementite structure forms✓
💡 Explanation
Heating steel above the austenite finish temperature causes grain growth because this promotes diffusion and ferrite-cementite formation rather than incomplete transformation. Therefore, a full ferrite-cementite structure forms, rather than forming martensite because the cooling phase is slow.
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