A Study on the Development of Mach Peening for Prolonging Fatigue Life of Machine Structural Alloy Steel
The light weight components, crucial in automobiles and machinery, is require hight strength. Mach peening process is one of many of techniques utilized for improving fatigue properties. From the results of rotary bending fatigue tests, the fatigue strength increases up to 129% in mach peening specimen compared with un-peening. A layer of highly compressed residual stress is obtained by mach peening. The compressive residual stress, induced by mach peening, seems to be an important factor for increasing the fatigue strength.
Changhee Lee, Jong-Bong Lee, Dong-Hwan Park and Suck-Joo Na
B. K. Lim "A Study on the Development of Mach Peening for Prolonging Fatigue Life of Machine Structural Alloy Steel", Materials Science Forum, Vols. 580-582, pp. 621-624, 2008