Question

For high temperature deformation, the bigger the gran sine, the higher the creep rate. a)-True b)- False

Answer 1

a

Step-by-step explanation:

a

Answer 2

The given statement is False.

Step-by-step explanation:

This is because at high temperature the creep rate depends on grain boundary area, increasing with an increase in grain boundary area thus decreasing the grain size. Thus at higher temperatures, grain size has opposite effect , the bigger the grain size the slower the slower is the creep rate, the larger the grain boundary area.