基于多角度下TC4钛合金表面多颗粒动态冲蚀仿真研究  

Simulation Study on Multi-Particle Dynamic Erosion of TC4 Titanium Alloy Surface Based on Multiple Angles

作　　者：张亚辉 吕晓仁[1] 柏春光[2] 杜菲菲 李兴海 郭映福 ZHANG Yahui;LYU Xiaoren;BAI Chunguang;DU Feifei;LI Xinghai;GUO Yingfu(College of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Qinghai Salt Lake Industry Co.,Ltd.,Golmud 816000,China)

机构地区：[1]沈阳工业大学机械工程学院,辽宁沈阳110870 [2]中国科学院金属研究所,辽宁沈阳110016 [3]青海盐湖工业股份有限公司,青海格尔木816000

出　　处：《材料保护》2024年第5期10-17,41,共9页Materials Protection

摘　　要：为了准确地预测TC4钛合金材料固体颗粒冲蚀的损伤过程,采用显式动力学有限元分析手段,建立了一个弹塑性有限元模型来模拟三维结构中多颗粒模型的动态冲蚀过程,并结合了Johnson-Cook材料模型和应变累积失效模型。结果表明:最大塑性变形发生在第一次碰撞时,且随着碰撞次数的增加而减小。冲蚀角度和速度显著影响颗粒和靶材表面之间的接触时间,动能损失随着冲蚀速度和角度的增加而增加。在低冲蚀角下,动态冲蚀过程中切向接触力和法向接触力有多个极大值和极小值,冲蚀机理主要是塑性变形和切向剪切。在高冲蚀角下,球形颗粒能很好地模拟冲蚀过程中对材料的剪切和挤压作用。从微观机制上解释了入射角度和入射速度对多颗粒连续冲蚀行为的影响,明确了冲蚀坑的动态冲蚀机理和几何演化规律。In order to accurately predict the damage process of solid particle erosion in TC4 titanium alloy materials,explicit dynamic finite element analysis was employed.An elastoplastic finite element model was established to simulate the dynamic erosion process of multiple particles in a three-dimensional structure.This simulation incorporated the Johnson-Cook material model and the strain cumulative failure model.Results showed that the maximum plastic deformation occurred at the first collision and decreased with the increase of the number of collisions.The erosion angle and velocity significantly affected the contact time between the particles and the target surface,and the kinetic energy loss increased with an increase in the erosion velocity and angle.At low erosion angles,the dynamic erosion process exhibited multiple peaks and troughs in tangential and normal contact forces,with the erosion mechanism primarily involving plastic deformation and tangential shearing.At high erosion angles,spherical particles effectively simulated the shearing and compressive actions on the material during the erosion process.The effects of the incident angle and velocity on the continuous multi-particle erosion behavior were explained from a microscopic mechanism perspective,clarifying the dynamic erosion mechanisms and geometric evolution of erosion pits.

关 键 词：TC4 冲蚀角度 冲蚀速度 动能损失率 接触时间 冲蚀率 

分 类 号：TG174.2[金属学及工艺—金属表面处理] TH142.2[金属学及工艺—金属学]