【作者】 李晋炜； 巩水利； 李晓延； 张亦良；

【Author】 Li Jinwei~(1,2),Gong Shuili~2,Li Xiaoyan~3,Zhang Yiliang~1 (1.Beijing University of Technology,Beijing 100124,China; 2.Beijing Aeronautical Manufacturing Technology Research Institute,Beijing 100024,China; 3.Beijing University of Technology,Beijing 100124,China)

【机构】 北京工业大学机械工程与应用电子技术学院； 北京航空制造工程研究所高能束流加工技术重点实验室； 北京工业大学材料科学与工程学院；

【摘要】 针对航空工业应用广泛的TA15钛合金,主要研究其激光焊接接头的损伤行为和机理。根据连续损伤力学的基本理论,从宏观上建立连续损伤力学模型,研究损伤随塑性应变的演化发展规律;采用卸载弹性模量法测量TA15钛合金激光焊接接头的损伤参量,获得单轴加载情况TA15合金激光焊接接头的损伤演化方程。测试结果表明:TA15钛合金激光焊接接头的损伤演化速度高于纯母材。激光焊接接头在初始阶段的损伤发展较快。更多还原

【Abstract】 In this research,damage behavior and mechanism of laser welded joints for TA15 Titanium alloys were investigated by experimental and numerical methods.A heterogeneous model of the joints was constructed based on the evaluation of the microstructure and mechanical properties of the joints.In low cycle fatigue,the damage was mainly found in the welds but not the base metal.The tested results shown that the damage of the laser welded joints was dominated by base metal and the higher damage resistance could be reached in the narrower weld size.更多还原