Cutting force modeling in high-speed machining of selective laser melted Ti6Al4V alloys based on a modified constitutive model considering thermally activated effect  

作　　者：Dejian LIU Chenbing NI Youqiang WANG Lida ZHU Zhongpeng ZHENG Wei LU Naixin ZHANG Xingbao HUANG 

机构地区：[1]School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao,266520,China [2]Key Lab of Industrial Fluid Energy Conservation and Pollution Control,Ministry of Education,Qingdao,266520,China [3]School of Mechanical Engineering and Automation,Northeastern University,Shenyang,110819,China [4]School of Mechanical Engineering,Tsinghua University,Beijing,100084,China [5]Shandong Zhongheng Jingxin Carbon Fiber Technology Development Co.,Ltd,Dezhou,251100,China [6]State Key Laboratory of Bridge Safety and Resilience,College of Civil Engineering,Hunan University,Changsha,410082,China

出　　处：《Science China(Technological Sciences)》2025年第3期138-155,共18页中国科学(技术科学英文版)

基　　金：supported by the Shandong Provincial Natural Science Foundation,China(Grant Nos.ZR2023QE041,ZR2021ME063);the China Postdoctoral Science Foundation(Grant No.2023M731862);the National Natural Science Foundation of China(Grant No.51975112)。

摘　　要：The thermally activated effect can produce a vital influence on the mechanical property and cutting force of metal materials in the machining process.An insight can be gained into the action criteria of the thermally activated effect on the cutting force,which provides a solid basis of the research of material performance and machinability.In this study,a cutting force model of selective laser melted(SLMed)Ti6Al4V alloy is proposed by introducing the modified constitutive model with thermally activated effects and the analytical model of the deformation zone into the cutting force model.The anisotropic properties of SLMed Ti6Al4V alloy under different scanning strategies(0°,67.5°,and 90°)are explored by combining with the cutting force model,constitutive model and analytical model of deformation zone(primary deformation and tool-chip contact area).The action of thermally activated effects on the cutting force,primary deformation and tool-chip contact zone is also researched in detail.Milling experiments and predictions of SLMed Ti6Al4V alloy under different scanning strategies have been implemented to reveal the effectiveness of this new model.The comparison results indicate that the proposed milling force model can effectively predict milling force and reflect well on the anisotropy of SLMed Ti6Al4V alloy.In addition,this proposed force model can well analyze the action mechanism of the thermally activated effect on the milling force of SLMed Ti6Al4V alloy,which is significantly essential for the machining mechanism research in terms of a microscopic perspective.

关 键 词：cutting force model modified constitutive model thermally activated effect SLMed Ti6Al4V alloy laser scanning strategies anisotropic properties 

分 类 号：TG1[金属学及工艺—金属学]