The fatigue strength of materials increases A with temperatu

The fatigue strength of materials increases

A: with temperature

B: by providing scratches on the surface

C: by providing notches

D: by under stressing the material

Iron carbon equilibrium phase diagram

A: is constructed by plotting temperature along y-axis and carbon percentage

B: establishes a correlation between the microstructure of steel and cast iron

C: indicates the phase changes that occur during heating and cooling

D: all of the above

E: none of the above

Solution

1) c. by providing notches

2) d. all the above