For pure metal the recrystallization temperature is normally

For pure metal, the recrystallization temperature is normally about 0.2T_m 0.1T_m 0.4T_m After an edge dislocation has passed through some of a crystal, the atomic arrangement of that region is disordred. True False As a metal is strain hardened, its ductility increases. decreases. Grain growth must always be preceded by recovery and recrystallization. True False How does grain size influence the strength of a polycrystalline material? Strength_fine-grained=Strength_coarse-grained Strength_fine-grained > Strength_coarse-grained Strength_ine-grained

Solution

1.0.4Tm

2.TRUE

3.Decreases

4.True   .Grain growth occurs when recovery and recrystallisation are complete

5.3.      Strength of a material increases proportional to squareroot of the grain size