Question

How is the ductility of the material affected due to tempering?

(a) Increases with an increase in temperature

(b) Decreases with an increase in temperature

(c) Increases constantly

(d) Does not change

I had been asked this question in an interview for internship.

The query is from Tempering in chapter Heat Treatment of Engineering Material & Metallurgy

Answer 1

Right answer is (a) Increases with an increase in temperature

For explanation I would say: The hardness and tensile and yield strengths of the material decrease with increasing tempering temperature. On the other hand, however, it is noted that the ductility of the material increases with an increase in tempering temperature.