Describe the measures that may be taken to extend fatigue li

Describe the measures that may be taken to extend fatigue life of metallic components.

Solution

Four measures that may be taken to increase the fatigue life of a metallic component are:

(1) Polish the surface to remove stress amplification sites.

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

(3) Modify the design to eliminate notches and sudden contour changes.

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