基于DEFORM-3D的纯铝快速冷却搅拌摩擦焊数值模拟和试验研究
Numerical Simulation and Experimental Study on Rapid Cooling Friction Stir Welding of Pure Aluminum Based on DEFORM-3D
刘露涛 1顾帛坤 1卢正达 1许楠 1宋亓宁 1包晔峰1
作者信息
- 1. 河海大学机电工程学院,江苏 常州 213022
- 折叠
摘要
采用DEFORM-3D软件建立了A1050 纯铝传统搅拌摩擦焊(FSW)和快速冷却FSW焊缝的有限元模型,分析了冷却介质对焊缝温度场和微观组织演变的影响规律,并采用电子背散射衍射技术对两种FSW试验的结果进行分析,以验证模拟结果.结果表明:在焊接过程中通过添加冷媒介质,快速冷却FSW的峰值温度较传统FSW明显降低,在搅拌头后方快速冷却FSW的温度梯度明显大于传统FSW.快速冷却FSW焊缝的晶粒尺寸减小、小角度晶界比例增加且位错密度更高.模拟结果与试验结果基本吻合.
Abstract
The finite element model of conventional friction stir welding(FSW)and rapid cooling FSW of A1050 pure aluminum was established based on DEFORM-3D software,and the effect of the cooling medium on the temperature field and microstructure evolution of the weld was analyzed.The results of the two FSW tests were analyzed to verify the simulation results by using electron backscatter diffraction technique.The results show that the peak temperature of rapid cooling FSW is significantly lower than that of conventional FSW due to addition of cooling medium.The temperature gradient of rapid cooling FSW behind the tool is obviously bigger than that of conventional FSW.Compared with conventional FSW,the rapid cooling FSW weld has finer grains,and the ratio of low-angle grain boundary increases and the dislocation density is bigger.The simulation results are consistent with the experimental results.
关键词
纯铝/搅拌摩擦焊/温度场/微观组织Key words
pure aluminum/friction stir welding(FSW)/temperature field/microstructure引用本文复制引用
基金项目
江苏省自然科学基金资助项目(BK20211076)
国家自然科学基金资助项目(51805145)
大学生创新创业训练计划项目(202210294149Y)
出版年
2024
NETL
NSTL
万方数据