中南大学学报（自然科学版）2025，Vol.56Issue(6)：2248-2256,9.DOI:10.11817/j.issn.1672-7207.2025.06.010
Ti6Al4V钛合金低温本构模型构建与低温切削过程数值仿真
Construction of low temperature constitutive model and numerical simulation of cryogenic cutting process for Ti6Al4V titanium alloy
摘要
Abstract
The low temperature dynamic constitutive model of Ti6Al4V titanium alloy for cryogenic cutting processing was researched to reveal the mechanical and physical characteristics of materials during cryogenic milling.The mechanical response and temperature variation of the material during low-temperature milling at 20 ℃ to-196 ℃ were studied.The results show that the established constitutive model has an error of 8％to 10％in predicting the stress strain relationship at strain rate from 5 000 s-1 to 7 000 s-1 and temperature from-100 ℃ to-196 ℃.The cutting simulation model established based on the constitutive model has a relative error of less than 6.26％in predicting cutting force compared to experimental values when the cutting speed is 40-80 m/min,the radial cutting depth is 0.5 mm,and the feed engagement is 0.05 mm/z.With the cooling temperature decreases from 20 ℃ to-196 ℃,the cutting temperature decreases from 78 ℃ to a minimum of-150 ℃.The milling force decreases with the increase of cutting speed,significantly increases with the decrease of cooling temperature,and reaches a maximum value of 416.57 N at-50 ℃ before decreasing.The research results can provide theoretical models and simulation technology support for the cryogenic cutting practice of Ti6Al4V titanium alloy.关键词
Ti6Al4V/低温本构模型/低温切削/有限元仿真分析/切削温度/切削力Key words
Ti6Al4V/low temperature constitutive model/cryogenic milling/finite element simulation analysis/milling temperature/milling force分类
矿业与冶金引用本文复制引用
刘根睿,杨东..Ti6Al4V钛合金低温本构模型构建与低温切削过程数值仿真[J].中南大学学报（自然科学版）,2025,56(6):2248-2256,9.基金项目
国家自然科学基金资助项目(52005002) （52005002）
安徽省自然科学基金资助项目(1908085QE230) （1908085QE230）
安徽省高等学校自然科学研究重大项目(2023AH040010)(Project(52005002)supported by the National Natural Science Foundation of China （2023AH040010）
Project(1908085QE230)supported by the Natural Science Foundation of Anhui Province （1908085QE230）
Project(2023AH040010)supported by Key Project of Natural Science Research in Universities of Anhui Province) （2023AH040010）
