Effect of Surface Nanocrystallization Method on Fatigue Strength of TA2
The enhancement of the fatigue strength is significant for the engineering applications of commercial pure titanium and its alloys. The paper investigated improvement of fatigue strength for commercial pure titanium by combined high-energy shot peening. Firstly, nano-crystallization in surface layer of pure titanium was carried out by high-energy shot peening, and then the shot peening with small diameter shots was introduced to degrade the surface roughness, enhancing the quality of the nano-grained surface. The fatigue limit of pure titanium by high-energy shot peening turns out to be increased by 34%, and the fatigue limit of pure titanium by compound high-energy shot peening turns out to be increased by 52.3%, according to the results. Effective factors such as surface states etc. to fatigue life, the fatigue crack initiation and propagation behaviors were also discussed in this paper.
combined high-energy shot peening nanocrystallization fatigue limit titanium
Ai-ling Wen Rui-ming Ren Shengwu Wang Jun-yong Yang
School of Mechanical Engineering, Dalian Jiao tong University, Dalian 116028, China School of Materials Science and Engineering, Dalian Jiao tong University, Dalian 116028, China School of Civil and Safety Engineering, Dalian Jiao tong University, Dalian 116028, China Department of Bogies, Tangshan Railway Vehicle Co.Ltd.Tangshan City 063035, China
国际会议
10th International Symposium on Eco-Materials Processing and Design(第10届国际生态材料加工与设计研讨会)
西安
英文
545-549
2009-01-13（万方平台首次上网日期，不代表论文的发表时间）