表面技术2016，Vol.45Issue(4)：5-9,52,6.DOI:10.16490/j.cnki.issn.1001-3660.2016.04.002
TC4钛合金激光冲击强化与喷丸强化的残余应力模拟分析
Simulation Analysis of the Residual Stress Field of TC4 Ti Alloy under Laser Shock Peening and Shot Peening
摘要
Abstract
Objective By measure of the residual stress of Laser shock peening ( LSP) and shot peening ( SP) tests, the differ-ences between LSP and SP in formation mechanism, depth layer and uniformity of residual stress were found out. Methods On one hand, finite element method ( FEM) was used to simulate the process of LSP and SP. The mechanical behaviors of TC4 under LSP and SP were compared. In addition, the formulation of residual stress was studied and the law of the residual stress was summa-rized. On the other hand, the residual stress of TC4 which had been treated with SP and LSP was measured using the 2-D X-ray method. Eventually, the result of experiment was compared with the result of simulation, and the effectiveness of FEM simulation was confirmed. Results The results showed that when both methods caused -500 MPa residual stress on the surface of TC4, the depth of compressed residual stress caused by LSP could reach 0. 6 mm, while the depth of compressed residual stress caused by SP was only 0. 15 mm. Conclusion Because the mechanism of causing plastic deformation was different, LSP could cause deeper com-pressed residual stress. Meanwhile, the distribution of residual stress caused by LSP was more uniform than that caused by SP when the fraction of coverage was 100%.关键词
激光冲击强化/喷丸强化/表层改性/数值模拟/残余应力/延寿Key words
laser shock peening/shot peening/surface layer modification/numerical simulation/residual stress/prolong life分类
矿业与冶金引用本文复制引用
蒋聪盈,黄露,王婧辰,高玉魁,仲政..TC4钛合金激光冲击强化与喷丸强化的残余应力模拟分析[J].表面技术,2016,45(4):5-9,52,6.基金项目
国家自然科学基金项目(11372226) （11372226）
航空科学基金项目(2014ZE38008) （2014ZE38008）
中央高校基本科研业务费专项资金资助 Supported by the National Natural Science Foundation of China (11372226), Aeronautical Science Foundation of China (2014ZE38008) and the Fundamental Research Funds for the Central Universities （11372226）
