文献类型：期刊文献

英文题名：Multiscale research of microstructure evolution during turning Ti-6Al-4V alloy based on FE and CA

作者：Zhou, Xiaorong He, Lin Zhou, Tao Jiang, Hongwan Xu, Jiangyi Tian, Pengfei Zou, Zichuan Du, Feilong

第一作者：Zhou, Xiaorong

通信作者：He, L[1]

机构：[1]Guizhou Univ, Sch Mech Engn, Guiyang 550025, Peoples R China;[2]Liupanshui Normal Coll, Liupanshui 553004, Peoples R China;[3]Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Peoples R China

第一机构：Guizhou Univ, Sch Mech Engn, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Sch Mech Engn, Guiyang 550025, Peoples R China.

年份：2022

卷号：922

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20223012421180);Scopus(收录号：2-s2.0-85134844282);WOS:【SCI-EXPANDED(收录号:WOS:000852664300002)】；

基金：This work is financially supported by National Natural Science Foundation of China (Grant No.51765009) , National Natural Science Foundation of China (52005118) , Science and Technology Plan Project of Guizhou Province (Grant No. QKHJC [2022] ZD026) .

语种：英文

外文关键词：Microstructure evolution; FE-CA; Material constitutive parameters identification; Multiscale; Ti-6Al-4V alloy

摘要：High temperature and severe deformation induced by the turning process of Ti-6Al-4V alloy will significantly impact the microstructure evolution of the chip and machined surface layer, thus significantly affecting the mechanical properties of the machined part. This study innovatively proposed a coupling simulation technology regarding finite element (FE) and cellular automata (CA) to simulate the microstructure evolution on macroscale and mesoscale, respectively, to improve the mechanical performance of the machined part. The modified Johnson and Cook (JC) constitutive model was used and its constitutive parameters were determined by combining an experimental method with an inverse identification methodology, to improve the precision of FE simulation. Based on the determined constitutive parameters, the Johnson-Mehl-Avrami-Kolmogorov (JMAK) models of dynamic recrystallization (DRX) were integrated into the FE model to investigate the distribution fields of grain size on macroscale. Afterward, the microstructure evolution on mesoscale was simulated successfully based on CA models of microstructure evolution and related input parameters obtained from the FE simulation. Orthogonal cutting experiments and corresponding tests adopting Electron Back Scattering Diffraction (EBSD), scanning electron microscopy (SEM) and metallographic microscope were performed to verify the credibility of FE and CA simulations. The results of the simulation and the experiments showed a reasonable consistency. The effects of cutting parameters on the grain size were analyzed through simulations and experiments. As indicated by the results, the degree of grain refinement occurring in the adiabatic shear band and machined surface layer increased with the increase in the cutting speed and the feed rate under the selected ranges of cutting parameters, whereas the effect mechanisms of the cutting speed and the feed rate were different, which could be conducive to selecting appropriate cutting parameters, so as to improve the mechanical properties of the machined part. (C) 2022 Elsevier B.V. All rights reserved.