微量Zr对深冷轧制Al-Cu-Mg合金微观组织及性能的影响  

Effect of trace Zr on microstructure and mechanical properties of deep cryogenic rolled Al-Cu-Mg alloy

作　　者：谢尚恒 孙有平[1,2,3] 朱嘉欣 方德俊 Xie Shangheng;Sun Youping;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9期174-180,共7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);柳州市科技计划(2021CBA0102);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)、电子万能试验机、X射线衍射仪(XRD)和扫描电镜(SEM)等研究了微量Zr添加对深冷轧制Al-Cu-Mg合金板材显微组织及力学性能的影响。结果表明,微量Zr元素的添加使Al-Cu-Mg合金晶粒细化,第二相粒子尺寸减小且分布更均匀,主要为θ-Al_(2)Cu相。添加Zr能有效提升Al-Cu-Mg合金的力学性能,Al-Cu-Mg-Zr合金的抗拉强度、伸长率及布氏硬度分别为610 MPa、10.3%和176 HBW,相对未添加Zr的Al-Cu-Mg合金分别增加了67 MPa、2.5%和22 HBW。位错强化对Al-Cu-Mg-Zr合金强度提升的贡献显著,达到了325 MPa。此外,经深冷轧制后Zr增强了Al-Cu-Mg合金在(111)、(200)和(220)的织构极密度,但是未改变织构类型。Effect of trace Zr addition on microstructure and mechanical properties of deep cryogenic rolled Al-Cu-Mg alloy sheet was studied by means of optical microscope(OM),electronic universal testing machine,X-ray diffraction(XRD) and scanning electron microscope(SEM).The results show that the trace Zr addition refines the Al-Cu-Mg alloy grains,and makes the size of second-phase particles reduce and more evenly distribute,mainly as the θ-Al_(2Cu) phase.The addition of Zr effectively improves mechanical properties of the Al-Cu-Mg alloy,the tensile strength,elongation and Brinell hardness of which are 610 MPa,10.3% and 176 HBW,and increases by 67 MPa,2.5% and 22 HBW relative to the Al-Cu-Mg alloy without Zr addition,respectively.The contribution of dislocation enhancement is significant to the strength enhancement of the Al-Cu-Mg-Zr alloy,reaching 325 MPa.In addition,the Zr addition enhances the texture pole density of the Al-Cu-Mg alloys in the(111),(200) and(220) crystal planes after deep cryogenic rolling,but the texture type is not changed.

关 键 词：AL-CU-MG合金 Zr添加 深冷轧制 微观组织 力学性能 织构 

分 类 号：TG146.2[一般工业技术—材料科学与工程]