文献类型：期刊文献

英文题名：Study on the Impact of Dual-Stage Heat Treatment on Residual Stress and Fatigue Life of Severely Plastic Deformed Ti6Al4V Titanium Alloy

作者：Zhang, Ping[1];Sun, Yajie[1];Jiang, Xiaomin[1];Li, Guohong[1]

机构：[1]Guangdong Ocean Univ, Coll Mech & Power Engn, Zhanjiang, Peoples R China

年份：2026

外文期刊名：JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE

收录：SCI-EXPANDED(收录号：WOS:001758998700001)、、WOS

基金：This study was funded by several organizations, including the National Natural Science Foundation of China under grant numbers 51705270 and the Shandong Qingchuang Science and Technology Project (grant number 2019KJB022).

语种：英文

外文关键词：dual-Stage heat treatment; fatigue life; residual stress; severe plastic deformation; Ti6Al4V titanium alloy

外文摘要：This study systematically investigates the effects of dual-stage heat treatment on residual stress relief and fatigue life of severely cold-rolled Ti6Al4V alloy. The synergistic influence of severe plastic deformation and dual-stage heat treatment on residual stress evolution and fatigue performance is examined. Two dual-stage heat treatment routes were designed: HT1 involves continuous heating with a 2 h hold at 400 degrees C followed by ramping to the second-stage temperature, while HT2 includes intermediate cooling to room temperature before reheating. Experimental and simulation results show that extended second-stage treatment enhances stress relaxation; for example, under HT1 at 600 degrees C for 4 h, compressive residual stress at 4.5 mm depth decreased from -101.6 to -82.8 MPa. Moreover, optimized HT2 conditions (600 degrees C for 2 h) improved fatigue life by 16.1% compared with HT1. This work provides a comprehensive thermomechanical framework for residual stress control and fatigue optimization in Ti6Al4V, offering guidance for enhancing the service stability of high-performance titanium alloy components.