连续挤压工艺对Al-0.5Fe合金组织和性能的影响  

Effect of Conform Process on Evolution of Microstructure and Properties of Al-0.5Fe Alloy

作　　者：孙华辰 张舵 刘旭东[1,3] 苏峻田 姜海昌[1,3] SUN Huachen;ZHANG Duo;LIU Xudong;SU Juntian;JIANG Haichang(CAS Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]中国科学院金属研究所中国科学院核用材料与安全评价重点实验室,沈阳110016 [2]中国科学技术大学材料科学与工程学院,沈阳110016 [3]中国科学院金属研究所师昌绪先进材料创新中心,沈阳110016

出　　处：《材料研究学报》2024年第11期821-827,共7页Chinese Journal of Materials Research

基　　金：中国博士后科学基金(2022M713215);广西科技重大专项(2023AA08011);中试基地中试验证类项目(2022JH24/10200034)。

摘　　要：在Al-0.5Fe合金导线的制备过程引入连续挤压工艺,使用扫描电镜(SEM)、电子背散射衍射(EBSD)和透射电镜(TEM)等手段表征其在连续挤压过程中组织和性能并研究其演变。结果表明:连续挤压1道次后这种合金的抗拉强度和导电率同步提高,抗拉强度由76.3 MPa提高到90.2 MPa,导电率由62.0%IACS(国际电器导体公制度,简称IACS)提高到62.3%IACS。随着连续挤压道次的增加合金的抗拉强度、导电率和初生相等效直径都出现降低的趋势,连续挤压4道次后抗拉强度降低到78.4 MPa,导电率降低到61.95%IACS,初生相等效直径降低到0.31μm。随着连续挤压道次的增多,组织中第二相尺寸的减小和面积分数的降低使合金的导电率降低。There are many hard primary phases in Al-Fe alloy,which are prone to stress concentra-tion during deformation,leading to alloy fracture and significantly increasing the wire breakage rate of alu-minum alloy wires.In order to break down the primary secondary phase in the alloy and refine the micro-structure of the alloy,this paper introduces the so-called“Conform process”i.e.continuous extrusion pro-cess in the preparation of Al-0.5Fe alloy wires.Correspondingly the evolution of the microstructure and properties of Al-0.5Fe alloy were characterized by means of scanning electron microscopy(SEM),elec-tron backscatter diffraction(EBSD),transmission electron microscopy(TEM)and tensile testing machine.The results showed that after 1st pass,the tensile strength and EC of the alloy increased simultaneously,with the tensile strength increasing from 76.3 MPa to 90.2 MPa and the electric conductivity(EC)increas-ing from 62.0%IACS to 62.3%IACS;With the increase of conform passes,the tensile strength,EC,and equivalent size of the primary phase all show a decreasing trend.After 4th pass,the tensile strength de-creases to 78.4 MPa,the EC decreases to 61.95%IACS,and the equivalent size of the primary phase decreases to 0.31μm.Through comparative analysis of the microstructures,it was found that with the in-crease of Conform passes,the decrease of EC may be ascribed to the gradual decrease in size and area fraction of the secondary phase.

关 键 词：金属材料 AL-FE合金 连续挤压 第二相 导电率 

分 类 号：TG379[金属学及工艺—金属压力加工]