Research Paper
Influence of Fine Particle Bombarding on Fatigue Characteristics of SUP10 Containing Surface Defect
2017 Volume 56 Issue 6 Pages 329-333
Details
2017 Volume 56 Issue 6 Pages 329-333
SUP10, which has surface defects, was subjected to a fatigue test and the effects of fine particle peening were analyzed. Moreover, a comparison with shot peening was performed.
The surface defect was made with a twist drill （0.2, 0.4, 0.6 mm）. The defect depth is half the diameter of the twist drill bit. High-speed steel balls were used for fine particle and shot peening.
When each processing was performed after introducing a surface defect in the sample, it was found that fine particle peening suppresses fatigue strength reduction more than shot peening. The reason for this is considered to be an improvement in the hardness of the drill bottom and the influence of residual stress.
