复合添加Sc、Er、Be对Al-Zn-Mg-Cu合金组织与性能影响  

Effects of Sc,Er and Be Compound Addition on Microstructure and Properties of AlZn-Mg-Cu Alloy

作　　者：张博涛 贺永东[1] 赵亿坤[2] 白万全 陈长科 刘小龙 陈守俊 杜玉峰 ZHANG Botao;HE Yongdong;ZHAO Yikun;BAI Wanquan;CHEN Changke;LIU Xiaolong;CHEN Shoujun;DU Yufeng(School of Materials Science and Engineering,Xinjiang University,Urumqi 830046;School of Physics Science and Technology,Xinjiang University,Urumqi 830046;Tianshan Aluminum Co.,Ltd.,Shihezi 832000;Xinjiang Joinworld Co.,Ltd.,Urumqi 830063;Xinjiang Tianlong Mining Co.,Ltd.,Changji 831100;Xinjiang Sheng'an New Material Technology Co.,Ltd.,Hami 839000;Xinjiang Nongliushi Aluminum Industry Co.,Ltd.,Wujiaqu 831300)

机构地区：[1]新疆大学材料科学与工程学院,乌鲁木齐830046 [2]新疆大学物理科学与技术学院,乌鲁木齐830046 [3]天山铝业有限公司,石河子832000 [4]新疆众和股份有限公司,乌鲁木齐830063 [5]新疆天龙矿业股份有限公司,昌吉831100 [6]新疆盛安新材料科技有限公司,哈密839000 [7]新疆农六师铝业有限公司,五家渠831300

出　　处：《特种铸造及有色合金》2024年第10期1409-1415,共7页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51861033);新疆维吾尔自治区科技厅重点研发专项资助项目(2020B02007)。

摘　　要：采用光学显微镜、电子背散射衍射、扫描电镜、透射电镜和维氏硬度试验方法,研究了Sc、Er、Be复合添加对Al-8.3Zn-2.2Mg-2.3Cu合金组织与性能的影响。结果表明,Sc、Er、Be元素的加入,使小角度晶界占比高达56.2%,有效减少了合金中小角度晶界向大角度晶界的转变,且合金没有表现出明显的择优取向。T6处理后,合金内部及晶界处存在大量的球形Al3Sc弥散相,加速了η′相的析出,同时阻碍了晶界与位错运动。Be的加入对合金起到固溶强化的作用,部分Be以α-Be形式存在,另一部分在晶界处形成含Be的第二相;T6态合金硬度(HV)为240.6。The effects of compound addition of Sc,Er,and Be on the microstructure and properties of Al-8.3Zn2.2Mg-2.3Cu alloys were investigated using optical microscope(OM),electron backscatter diffraction(EBSD),scan⁃ning electron microscope(SEM),transmission electron microscope(TEM),and Vickers hardness test methods.The results indicate that the addition of Sc,Er,and Be elements can increase the proportion of low angle grain boundaries to 56.2%,effectively reducing the transition from low angle grain boundaries to high angle grain boundaries in the alloy,and the alloy presents little preferred orientation.After T6 treatment,large amounts of spherical Al3Sc disper⁃soids are observed within the alloy and at grain boundaries,accelerating the precipitation ofη′while hindering grain boundary and dislocation movements.The addition of Be plays a role in solid solution strengthening.Additionally,par⁃tial Be exists in the form ofα-Be,while another portion forms a Be-containing second phase at the grain boundaries.The hardness of the alloy in T6 state is 240.6 HV.

关 键 词：AL-ZN-MG-CU合金 复合添加 微观组织 钉扎效应 

分 类 号：TG146.21[一般工业技术—材料科学与工程]