Laser Shock Peening of Aluminum Alloy 7050 for Fatigue Life Improvement
The effects of laser shock peening (LSP) on improving fatigue life of aluminum alloy 7050 are investigated.Surface hardness is increased corresponding to a high dislocation density induced by LSP.The X-ray diffraction stress measurement shows that LSP results in prominent increase of surface compressive stress,quasi-symmetrically distributed in the laser peened region.The fatigue life of the alloy 7050 in rivet fastener hole structure is notably improved owing to LSP.The sequence of LSP and fastener hole preparation also influence the fatigue cycle life of the alloy.
作 者： Qian Ming Lian Ying Zou Shikun Gong Shuili 作者单位： Qian Ming,Lian Ying(College of Laser Engineering,Beijing University of Technology)Zou Shikun,Gong Shuili(Beijing Aeronautical Manufacturing Technology Research Institute)
刊 名： 航空制造技术 ISTIC 英文刊名： AERONAUTICAL MANUFACTURING TECHNOLOGY 年，卷(期)： 2007 ""(z1) 分类号： V2 关键词： Laser shock peening Dislocation Compressive stress Fatigue life Aluminum