摘要采用 X 射线衍射法对钛合金线性摩擦焊试件的表面残余应力进行了测试。结果表明线性摩擦焊焊缝中心 X、 Y 两个方向均为拉应力, Y 向应力值明显大于 X 向,焊缝热影响区为压应力,由焊缝向外应力逐渐趋向于 0。经真空热处理后,试件各区域应力值都有不同程度的降低。从整体来看,热处理后试件表面残余应力趋于均匀化。
Abstract:X-ray diffraction approach is used to test the residual stress of the surface of the linear friction welding of titanium-alloy. It is proved that the residual stress in X and Y direction in the center of the welding is tension stress, and the stress in Y direction is obviously stronger than that in X direction. The stress in the heat affects zone of the welding is compressive stress, and the value of stress tends to zero from the center of the welding to the out zone. The stress values decrease to varying degrees in all regions of specimen after vacuum heat treatment. Overall, the residual stress of the surface tends to uniformity after heat treatment.