热机械处理提高Cr_(47)Ni_(33)Co_(10)Fe_(10)多组元共晶合金力学性能  

Thermomechanical Treatment Improves the Mechanical Properties of Cr_(47)Ni_(33)Co_(10)Fe_(10)Multi-component Eutectic Alloys

作　　者：薛赞 晋玺 毛周朱 兰爱东[1] 王大雨 乔珺威[1,3] XUE Zan;JIN Xi;MAO Zhouzhu;LAN Aidong;WANG Dayu;QIAO Junwei(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Institute of Applied Mechanics,College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of Interface Science and Engineering in Advanced Materials,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学材料科学与工程学院,太原030024 [2]太原理工大学机械与运载工程学院应用力学研究所,太原030024 [3]太原理工大学教育部先进材料界面科学与工程重点实验室,太原030024

出　　处：《材料导报》2025年第3期208-213,共6页Materials Reports

基　　金：国家自然科学基金(52301217);山西省应用基础研究计划项目(20210302124427);太原理工大学校基金(2022QN012);山西省高等学校科技创新项目(2021L040)。

摘　　要：无序面心立方(FCC)+无序体心立方(BCC)结构多组元共晶合金(MCEA)Cr_(47)Ni_(33)Co_(10)Fe_(10)具有重要的工程应用价值。本工作采用多道次冷轧使合金厚度减少90%并在800℃下退火1 h的热机械处理策略来提高合金力学性能。Cr_(47)Ni_(33)Co_(10)Fe_(10)合金热机械处理后的屈服强度(σ_(0.2))为1230 MPa,拉伸断裂应变(ε)为13%,屈服强度相对于铸态合金提高了864 MPa,是铸态合金的三倍多,且几乎没有损失塑性。高强度和高塑性的匹配来源于超细双相等轴晶组织替代了初始层片组织。本工作为提高双相共晶高熵合金的力学性能提供了一种可行的热处理工艺途径。The disordered face-centered cubic(FCC)+disordered body-centered cubic(BCC)multi-component eutectic alloy(MCEA)Cr_(47)Ni_(33)Co_(10)Fe_(10)has important engineering application value.In this work,we adopt a thermal mechanical treatment strategy of reducing alloy thickness by 90%through multiple passes of cold rolling and annealing at 800℃for 1 hour to improve the mechanical properties of the alloy.The yield strength(σ_(0.2))of Cr_(47)Ni_(33)Co_(10)Fe_(10)after thermomechanical treatment is 1230 MPa,and the tensile fracture strain(ε)is 13%.The yield strength has increased by 864 MPa compared to as cast alloys,which is more than three times that of the as-cast alloy,and there is almost no loss of plasticity.The matching of high strength and high plasticity comes from the substitution of the initial lamellar structure by the duplex ultrafine equiaxed grains.The work provides a feasible heat treatment process for improving the mechanical property of dual-phase eutectic high-entropy alloys.

关 键 词：共晶高熵合金 热机械处理 超细晶 力学性能 

分 类 号：TG156[金属学及工艺—热处理]