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Which failure occurs when austenite transforms completely in steel?

A)Increased ductile-brittle transition temperature
B)Enhanced fatigue crack propagation rate
C)Decreased ultimate tensile strength rapidly
D)Elevated thermal expansion coefficient value

💡 Explanation

An increase in the ductile-brittle transition temperature results from a complete austenite transformation because the grain structure shifts during the phase transition, therefore embrittling the material, rather than providing other effects to fatigue or expansion.

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