堆积方向对激光选区熔化TC4合金缺口件局部循环塑性行为的影响  

Influence of stacking direction on the local cyclic plastic behavior of selective laser melted TC4 alloy notched parts

作　　者：王志强 李建 赵询 赵雪同 徐英东 唐明扬 刘庆[3] 葛峻铭 肖敏 Wang Zhiqiang;Li Jian;Zhao Xun;Zhao Xuetong;Xu Yingdong;Tang Mingyang;Liu Qing;Ge Junming;Xiao Min(Shanghai Supervision and Testing Center for Nonferous Metals Industry Co.,Ltd.,Shanghai 201804,China;Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang 212013,Jiangsu,China;School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China;School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China;School of Mathematical Sciences,Jiangsu University,Zhenjiang 212013,Jiangsu,China)

机构地区：[1]上海有色金属工业技术监测中心有限公司,上海201804 [2]江苏大学土木工程与力学学院,江苏镇江212013 [3]江苏大学能源与动力工程学院,江苏镇江212013 [4]江苏大学机械工程学院,江苏镇江212013 [5]江苏大学数学科学学院,江苏镇江212013

出　　处：《钢铁钒钛》2024年第4期68-75,共8页Iron Steel Vanadium Titanium

基　　金：中国博士后基金面上项目(2020M681496);国家自然科学基金项目(52105149)。

摘　　要：通过数字图像相关技术从宏观塑性变形方面研究了堆积方向对激光选区熔化(SLM)TC4合金缺口件局部循环塑性行为的影响。结果表明:缺口附近的塑性变形受堆积方向和缺口半径的影响,进而影响缺口件的疲劳寿命。缺口根部的棘轮应变及其应变率随堆积方向改变(0°至90°)而降低,同时也随缺口半径的增加而降低。与缺口半径相比,棘轮应变及应变率和疲劳寿命对堆积方向敏感性更低。研究结果为SLM构件的疲劳设计提供了一定的理论参考。In this paper the influence of stacking direction on the local cyclic plastic behavior of selective laser melted(SLM)TC4 alloy notched parts had been investigated through digital image correlation technology.The results indicate that the plastic deformation near the root of the notched parts can be influenced by the stacking direction and notch radius,thereby affecting the fatigue life of the notched parts.The ratcheting strain and strain rate near the root of the notch decrease with the change of stacking direction(from 0°to 90°),and also decrease with the change of the notch radius.Compared with effect by notch radius,stacking direction cause less influence on the ratchet strain,strain rate and fatigue life.The research results will provide a certain theoretical reference for the fatigue design of SLM parts.

关 键 词：TC4 激光选区熔化 堆积方向 缺口件 循环塑性 棘轮应变 疲劳寿命 DIC 

分 类 号：TF823[冶金工程—有色金属冶金] TG665[金属学及工艺—金属切削加工及机床]