The Residual Stress Varying of Shot Peened TC4-DT Titanium Alloy

摘要：

Shot peening is an effective surface treatment method, which can improve the fatigue properties of metallic materials. In the present paper, the residual compressive stress field induced in TC4-DT titanium alloy after different shot peening conditions and thermal relaxation behavior were discussed. The process can cause residual compressive stress on the material surface compared to unpeened materials. The subsurface residual stress distributions of original and shot peened specimens were measured by an X-ray diffraction method. It was demonstrated that the residual compressive stress field induced by shot peening. Surface roughness was also increased with increasing shot peening intensity. Thermal relaxation behavior of residual stress was studied at 150,300°C with different ageing times. Temperature and time influences on the residual stress relaxation during ageing are controlled by thermally activated processes. Thermal residual stress relaxation process was discussed and analyzed by applying the Zener-Wert-Avrami function.

关键词： TC4-DT shot peening residual stress thermal relaxation

作者: Xiaonan Mao Guanjun Yang Lanlan Yu

作者单位: Northwest Institute for Nonferrous Metal Research ,Xian 710076 ,China

会议类型: 国际会议

会议名称: The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)

会议地点: 北京

会议语种:英文

页码: 954-958

在线出版日期: 2011-06-19（万方平台首次上网日期，不代表论文的发表时间）