Question

Which of these measures may be taken to increase the resistance to fatigue of a metal alloy.

		Polish the surface to remove stress amplification sites.
		Reduce the number of internal defects (pores, etc.) by means of altering processing and fabrication techniques.
		Modify the design to eliminate notches and sudden contour changes.
		Harden the outer surface of the structure by case hardening (carburizing, nitriding) or shot peening.
		All of the above.

Answer 1

Answer Option E.which all of the above.

Four Measures that may be taken to increase the fatigue resistance of a metal alloy are:

Polish the surface to remove stress amplification sites.

Reduce the number of internal defects (pores, etc.) by means of altering processing and fabrication techniques.

Modify the design to eliminate notches and sudden contour changes.

Harden the outer surface of the structure by case hardening (carburizing, nitriding) or shot peening.

As all the four options increase the resistance to fatigue of a metal alloy.The answer Is E(All of the above).