钢铁钒钛2025，Vol.46Issue(5)：85-92,8.DOI:10.7513/j.issn.1004-7638.2025.05.009
双轴拉伸状态下CoCrFeNiCux高熵合金应力应变行为研究
Study on the stress-strain behavior of CoCrFeNiCux high-entropy alloy under biaxial tensile state
张家乐 1赵建平 1常乐1
作者信息
- 1. 南京工业大学机械与动力工程学院,江苏南京 211816
- 折叠
摘要
Abstract
Using molecular dynamics(MD)simulations,the biaxial tensile behavior of CoCrFeNiCux(x=0.5,1.0,2.0,and 3.0)high-entropy alloys at different strain rates was simulated.The effects of cop-per content and strain rate on the biaxial tensile stress-strain behavior and the microscopic deformation mechanisms were analyzed.The results indicated that during the biaxial tensile process of CoCrFeNiCux high-entropy alloys,the face-centered cubic(FCC)structure and irregular atomic structure can transform into each other.As the Cu content increases,the Young's modulus,yield strength,and ulti-mate tensile strength of CoCrFeNiCux high-entropy alloys decrease,while an increase in strain rate en-hances their ultimate tensile strength and fracture strain.Compared to the uniaxial tension,the stress-strain behavior under both stress states exhibits the strain hardening and strain rate strengthening effects.However,under biaxial loading,the yield strength increases,while the ultimate tensile strength and fail-ure strain significantly decrease.This study provides important reference value for the design and pre-paration of this alloy.关键词
高熵合金/双轴拉伸/分子动力学/力学性能Key words
high-entropy alloy/biaxial tension/molecular dynamics/mechanical properties分类
矿业与冶金引用本文复制引用
张家乐,赵建平,常乐..双轴拉伸状态下CoCrFeNiCux高熵合金应力应变行为研究[J].钢铁钒钛,2025,46(5):85-92,8.
