Ti2AlNb钛合金电子束焊温度场与应力场有限元分析
Finite Element Analysis of Temperature Field and Stress Field of Ti2AlNb Titanium Alloy during Electron Beam Welding
邢博 1王世清1
作者信息
- 1. 西安石油大学 材料科学与工程学院,陕西 西安 710065
- 折叠
摘要
基于有限元软件,采用高斯面-高斯旋转体复合热源深入研究了Ti2AlNb钛合金电子束焊接头的温度场和残余应力场.结果表明:当电子束流为 10 mA,焊接速度为 360 mm/min时焊接接头成型较好,优先采用较大电子束流易形成熔宽较大的焊缝.焊缝内部应力为复杂三向应力状态,残余应力以纵向拉应力为主,集中分布于距焊缝中心 3.5 mm范围内.焊后最大等效应力为 635 MPa,小于材料屈服强度,较为安全.
Abstract
The temperature field and residual stress field of Ti2AlNb titanium alloy electron beam welding joint were studied by using Gaussian surface and rotary body composite heat source based on finite element software.The results show that the welding joint is well formed when the electronic beam current is 10 mA and the welding speed is 360 mm/min.It is preferred to use a big electron beam current to form welded seam with large weld width.The central area of the weld suffers complex stresses in three directions,and the residual stress is mainly longitudinal tensile stress,which is concentrated within 3.5 mm from the weldline.The maximum equivalent stress after welding is 635 MPa,which is less than the yield strength of the material,so the structure is safe.
关键词
电子束焊/数值模拟/温度场/残余应力Key words
electron beam welding/numerical simulation/temperature field/residual stress引用本文复制引用
基金项目
国家自然科学基金(51975469)
郑州机械研究所新型钎焊材料与技术国家重点实验室开放基金(SKLABFMT-2019-04)
哈尔滨工业大学先进焊接与连接国家重点实验室开放基金(AWJ-22M09)
出版年
2024
NETL
NSTL
万方数据