Investigation for Different Peening Techniques on Residual Stress Field of SiCw/Al Composite

Author:  Junjie Huang, Chuanhai Jiang, Xiaohu Chen
Source:  Conf Proc 2011: ICSP-11 South Bend, IN USA (pgs. 49-54)
Doc ID:  2011008
Year of Publication:  2011
Abstract:  
Abstract: In order to improve the residual stress field of SiCw/Al composite after conventional shot peening, modified warm peening, stress peening, compound peening as well as conventional peening were carried out on SiCw/Al composite specimens and residual stress fields of those specimens were investigated via X-ray measurement. Results show that conventional shot peening can improve residual stress field of SiCw/Al composite but the improvement has a limit. Comparing with conventional peening, modified warm peening can increase the maximum residual stress, the depth of compressive residual stress layer and improve stability of residual stress field meanwhile stress peening can increase all characteristic parameters of residual stress field efficiently. Compound peening combines the positive effects of modified warm peening and stress peening, and has the most strengthening effects. Keywords: modified warm peening, stress peening, compound peening, residual stress distribution