1.

The ductile to brittle transition temperature in metal is around ____ of melting point (Tm)?

A. 0.1 T<sub>m</sub>
B. 0.5 T<sub>m</sub>
C. 0.9 T<sub>m</sub>
D. 0.0001 T<sub>m</sub>
Answer» B. 0.5 T<sub>m</sub>


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