TC17钛合金线性摩擦焊接头内部残余应力测试分析  

Test and Analysis on Internal Residual Stress of Linear Friction Welding Joint of TC17 Titanium Alloy

作　　者：李菊 刘川 常川川 季亚娟 LI Ju;LIU Chuan;CHANG Chuanchuan;JI Yajuan(Aeronautical Key Laboratory for Welding and Joining Technologies,AVIC Manufacturing Technology Institute,Beijing 100024,China;Beijing Friction Welding Technology and Equipment Engineering Center,Beijing 100024,China;School of Mechatronic Engineering and Automation,Foshan University,Foshan 528225,China)

机构地区：[1]中国航空制造技术研究院航空焊接与连接技术航空科技重点实验室,北京100024 [2]北京市摩擦焊接工艺与装备工程中心,北京100024 [3]佛山科学技术学院机电工程与自动化学院,广东佛山528225

出　　处：《热加工工艺》2024年第9期34-38,44,共6页Hot Working Technology

基　　金：国家科技重大专项项目(2017-Ⅶ-0005-0098)。

摘　　要：为掌握TC17钛合金线性摩擦焊接头内部残余应力分布规律,采用轮廓法对TC17(α+β)/TC17(β)线性摩擦焊接头进行了残余应力测试,分析了接头内部沿振动方向(试样宽度方向,x向)应力以及沿顶锻方向(试样长度方向,y向)应力的分布规律。结果表明:x向应力在焊缝区域为拉应力,沿顶锻方向呈双峰分布,即焊缝两侧区域的应力高于焊缝中心,拉应力峰值位于距离焊缝中心2~3 mm位置处,约360 MPa,拉应力区域宽度达到30 mm。在焊缝中心截面上,y向应力在整个厚度上为拉应力,且上、下表层应力小于厚度中心位置;距试样宽度中心两侧27 mm区域的应力为拉应力,边缘区域的为压应力。In order to understand the distribution of residual stress of linear friction welding(LFW)joint of TC17 titanium alloy,the residual stress of the TC17(α+β)/TC17(β)LFWjoint was measured by contour method.The stress distributions of the joint along the vibration direction(x direction,the sample width direction)and the forging direction(y direction,the sample length direction)were analyzed.The results show that the x direction residual stress in the weld area is tensile stress,and it presents a bimodal distribution along the y direction,which means the stress of both sides of the weld is higher than that of the weld center.The tensile stress peak is at the position 2-3 mm away from the weld center,which is 360 MPa,and the width of the tensile stress area reaches 30 mm.In the cross section through the weld center,the y direction stress is tensile stress in the whole thickness direction,and the stress of the upper and lower surfaces is smaller than that of the center in the thickness direction.The stress of the area 27 mm away from the center at both sides in the sample width direction is tensile stress,and that of the edge area is compressive stress.

关 键 词：TC17钛合金 线性摩擦焊 残余应力 轮廓法 

分 类 号：TG453.9[金属学及工艺—焊接]