时效处理对深冷轧制Al-4.5Cu-1.5Mg-0.1Er合金显微组织与力学性能的影响  

Effect of aging treatment on microstructure and mechanical properties of cryorolled Al-4.5Cu-1.5Mg-0.1Er alloy

作　　者：谢尚恒 孙有平[1,2,3] 何江美 朱嘉欣[1,2] 方德俊 Xie Shangheng;Sun Youping;He Jiangmei;Zhu Jiaxin;Fang Dejun(School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou Guangxi 545006,China;Guangxi Earthmoving Machinery Collaborative Innovation Center,Liuzhou Guangxi 545006,China;Guangxi Key Laboratory of Automobile Components and Vehicle Technology,Liuzhou Guangxi 545006,China)

机构地区：[1]广西科技大学机械与汽车工程学院,广西柳州545006 [2]广西土方机械协同创新中心,广西柳州545006 [3]广西汽车零部件与整车技术重点实验室,广西柳州545006

出　　处：《金属热处理》2023年第10期182-187,共6页Heat Treatment of Metals

基　　金：中央引导地方科技发展专项(桂科ZY21195053);广西重点研发计划(桂科AB23026104);广西高等学校高水平创新团队项目(桂教师范[2019]52号)。

摘　　要：采用光学显微镜(OM)、X射线衍射仪(XRD)、扫描电镜(SEM)和电子万能试验机等研究了时效处理对深冷轧制Al-4.5Cu-1.5Mg-0.1Er合金板材显微组织和力学性能的影响。结果表明,经时效处理后,Al-4.5Cu-1.5Mg-0.1Er合金中析出相数量增多,分布更均匀,主要为S(Al2CuMg)相和θ(Al_(2)Cu)相。随时效温度的升高及时效时间的延长,部分第二相回溶、粗化,造成合金性能下降。深冷轧制态Al-4.5Cu-1.5Mg-0.1Er合金板材经180℃×8 h时效处理后获得了最佳综合性能,抗拉强度和断后伸长率分别为541 MPa和11.33%,比深冷轧制态铝合金分别提高了58 MPa和7.11%,此时合金的断裂类型为韧性断裂。Effect of aging treatment on microstructure and mechanical properties of cryorolled Al-4.5Cu-1.5Mg-0.1Er alloy plate was studied by means of optical microscope(OM),X-ray diffractometer(XRD),scanning electron microscope(SEM)and tensile tester.The results show that the amount of precipitated phases in the Al-4.5Cu-1.5Mg-0.1Er alloy after aging is increased and the distribution is more uniform,which are mainly S(Al_(2)CuMg)phase and θ(Al_(2)Cu)phase.As the aging temperature increases and the aging time is extended,part of the second phase redissolves and coarsens,resulting in the degradation of alloy properties.The best comprehensive properties are obtained when the cryorolled Al-4.5Cu-1.5Mg-0.1Er alloy plates are aged at 180℃ for 8 h,of which the tensile strength and elongation reach 541 MPa and 11.33%,respectively,improving by 58 MPa and 7.11% compared with that without aging.Meanwhile,the fracture type of the alloy is ductile fracture.

关 键 词：Al-Cu-Mg-Er合金 时效处理 显微组织 力学性能 织构 

分 类 号：TG146.2[一般工业技术—材料科学与工程]