钢铁钒钛2026，Vol.47Issue(2)：78-87,10.DOI:10.7513/j.issn.1004-7638.2026.02.010
Ti551钛合金热变形行为及热加工图研究
Study on the hot-deformation behavior and hot processing map of Ti551 alloy
摘要
Abstract
To investigate the hot deformation behavior of Ti551 titanium alloy,isothermal compression tests were conducted at temperatures ranging from 800℃to 950℃and strain rates between 0.01-1 s-1.Based on the true stress-true strain data,the hot deformation characteristics of Ti551 titanium al-loy were systematically analyzed.The results indicate that the flow stress of the Ti551 titanium alloy is highly sensitive to variations in temperature and strain rate.An Arrhenius-type constitutive model incor-porating strain compensation was established to describe the hot deformation behavior of the alloy,and the predictive capability of the model was evaluated.Furthermore,processing maps were constructed using the Prasad instability criterion,revealing the distribution characteristics of power dissipation effi-ciency and instability domains as functions of temperature and strain rate.The optimal hot processing window for the Ti551 titanium alloy was identified as the high-temperature and low-to-medium strain rate region,while potential flow instability regions were located in the low-temperature and high strain rate domain.In addition,the evolution of primary α-phase morphology and the variation in the α/β phase fraction under different deformation conditions were investigated.These results provide a theoret-ical basis for the design of hot working process parameters and the microstructure-property optimiza-tion of Ti551 titanium alloy.关键词
Ti551钛合金/热模拟压缩试验/本构方程/热加工图/热变形行为Key words
Ti551 titanium alloy/hot compression test/constitutive equation/hot processing map/hot deformation behavior分类
矿业与冶金引用本文复制引用
沈子扬,邓加东,钱东升,丁佐军,刘超..Ti551钛合金热变形行为及热加工图研究[J].钢铁钒钛,2026,47(2):78-87,10.基金项目
国家重点研发计划项目(2024YFB3714200) （2024YFB3714200）
国家自然科学基金资助项目(52475397) （52475397）
高等学校学科创新引智计划资助项目(B17034) （B17034）
教育部创新团队发展计划项目(No.IRT_17R83). （No.IRT_17R83）
