薄壁Ti6Al4V管件采用不同车削参数加工引起的表面残余应力的测量（英文）

Measurement of Surface Residual Stresses Generated by Turning Thin-Wall Ti6Al4V Tubes Using Different Cutting Parameters

同时考虑测量精度、测量可行性以及节约材料诸多方面的问题,运用有限元验证的方法确定零件合适的长度。同时运用精度较高的基于有限元分析的修正方法结合X射线法测量Ti6Al4V管件车削加工引起的表面残余应力,分析不同切削参数以及退火处理对表面残余应力的影响。结果显示:切削速度、进给量以及切削深度在指定范围内增大时会导致表面切削和进给方向的压应力增大,退火处理会使得表面2个方向的残余应力减小将近85%。

In the present study, finite element analysis（FEA） was used to determine the optimal required length of the workpiece, taking into consideration factors such as accuracy, convenience, and materials saving. A new and highly accurate FEA-based correction method involving simple calculations was proposed. The method was used in conjunction with XRD to determine the surface residual stresses of Ti6Al4 V tubes and analyze the effects of different turning parameters and annealing. It is found that the compressive residual stresses in cutting and feed directions will increase with increasing of cutting velocity, feed rate, and depth of cut within specific ranges, and that annealing will produce approximately 85% stress relaxation near the surface in both directions.