γ-TiAl合金纳米切削过程中随机表面粗糙度影响的原子模拟  

Atomistic Simulation of Effects of Random Roughness on Nano-cutting Process of γ-TiAl Alloy

作　　者：冯瑞成[1,2] 杨晟泽 邵自豪 姚永军 张隽 曹卉[1] 李海燕[1,2] Feng Ruicheng;Yang Shengze;Shao Zihao;Yao Yongjun;Zhang Jun;Cao Hui;Li Haiyan(School of Mechanical and Electronical Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Digital Manufacturing Technology and Application,Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学机电工程学院,甘肃兰州730050 [2]兰州理工大学数字制造技术与应用省部共建教育部重点实验室,甘肃兰州730050

出　　处：《稀有金属材料与工程》2022年第5期1650-1659,共10页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(52065036);Natural Science Foundation of Gansu Province(20JR5RA448);Hongliu First-Class Disciplines Development Program of Lanzhou University of Technology。

摘　　要：采用分子动力学模拟方法研究了随机粗糙度对γ-TiAl合金纳米尺度切削的影响。为了模拟真实工件表面,在考虑刀具不同前角和切削深度的情况下,采用多参数的Weierstrass-Mandelbrot(W-M)函数生成随机表面粗糙度,用工件的等效高度来量化切削深度。结果表明,粗糙度对工件的纳米切削有不可忽视的影响。此外,粗糙度的影响在不同切削参数的情况下也不同。The molecular dynamics simulations were conducted to investigate the effects of random roughness on nano-cutting ofγ-TiAl alloys.To simulate the actual workpiece surface,the random surface roughness was generated by a multivariate Weierstrass-Mandelbrot(W-M)function under the condition of different rake angles of cutter and depths of cutting.The equivalent height of the workpiece was used to quantify the depth of cutting.The molecular dynamics simulation results reveal that the roughness has a profound effect on the nano-cutting quality of the workpiece.Besides,the effects of roughness are also different under different cutting parameters.

关 键 词：分子动力学模拟 纳米切削 W-M函数 Γ-TIAL合金 

分 类 号：TG506[金属学及工艺—金属切削加工及机床]