磨料水射流喷丸强化3D打印TC4表面残余应力分布规律研究  

Study on Surface Residual Stress Distribution of 3D Printing TC4 by Abrasive Waterjet Shot Peening

作　　者：王屹祯 王湘田 侯荣国[1] 吕哲[1] 卢萍 张玉龙 王瑞 Wang Yizhen;Wang Xiangtian;Hou Rongguo;Lv Zhe;Lu Ping;Zhang Yulong;Wang Rui(School of Mechanical Engineering,Shandong University of Technology,Zibo,Shandong 255049,China)

机构地区：[1]山东理工大学机械工程学院

出　　处：《工具技术》2022年第8期67-71,共5页Tool Engineering

基　　金：山东省自然科学基金(ZR2020ME154)。

摘　　要：针对磨料水射流喷丸强化3D打印TC4材料表面,通过拉伸试验研究了其在准静态状态下的力学行为规律,获得其屈服强度为648.7MPa、应变强化系数为288.7MPa以及参考应变率为0.36的Johnson-Cook本构模型。采用ABAQUS数值模拟软件分析发现,磨料水射流钢丸速度为10.7~20.2m/s时,3D打印TC4材料的最大残余压应力为-191~-284MPa,喷丸速度与材料残余压应力表层厚度成正比。通过试验验证表明,3D打印TC4材料残余应力模拟结果与试验结果吻合,可为工程应用提供可靠数据依据。Aming at the surface of 3 D printed TC4 material is strengthened by abrasive waterjet shot peening,through the tensile test of 3 D printed TC4 material,the mechanical behavior of 3 D printed TC4 material under quasi-static state is studied.The yield strength of 3 D printed TC4 material is 648.7 MPa,the strain strengthening coefficient is 288.7 MPa,and the Johnson-Cook constitutive model with a strain rate of 0.36 is obtained.ABAQUS numerical simulation software is used to analyze the maximum residual compressive stress of 3 D printed TC4 material when the abrasive waterjet steel shot velocity is 10.7~20.2 m/s,the maximum residual compressive stress of 3 D printed TC4 material is from-191 MPa to-284 MPa.The shot peening velocity is proportional to the surface thickness of residual compressive stress of material.The simulation results of residual stress of 3 D printed TC4 material are consistent with the test results,which can provide reliable data basis for engineering application.

关 键 词：磨料水射流喷丸 3D打印TC4 本构模型 表面力学行为 残余压应力 

分 类 号：TG668[金属学及工艺—金属切削加工及机床] TH161.14[机械工程—机械制造及自动化]