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Which condition precipitates accelerated austenite decomposition in weldments?

A)Insufficient carbon diffusion distance
B)Critical cooling rate exceeded
C)High interpass temperature maintained
D)Excessive hydrogen concentration present

💡 Explanation

Exceeding the critical cooling rate during welding bypasses equilibrium phase transformations promoting martensite; therefore the mechanical properties are altered because the rapid cooling suppresses diffusion rather than allowing equilibrium phases evolve.

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