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← ScienceWhich 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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