0.2%Er对Al-6.5%Cu合金组织及性能的影响  

Effect of 0.2%Er on microstructure and properties of Al-6.5%Cu alloy

作　　者：孟恒 贺永东[1] 孙小涵 赵亿坤[3] 杜玉峰 Meng Heng;He Yongdong;Sun Xiaohan;Zhao Yikun;Du Yufeng(College of Materials Science and Engineering,Xinjiang University,Urumqi 830046,China;Shandong Energy Digital Technology Co.,Ltd.,Jinan 250101;College of Physical Science and Technology,Xinjiang University,Urumqi 830046,China;Xinjiang Nongliushi Aluminum Co.,Ltd.,Wujiaqu 831300,China)

机构地区：[1]新疆大学材料科学与工程学院,新疆乌鲁木齐830046 [2]山东能源数字科技有限公司,山东济南250101 [3]新疆大学物理科学与技术学院,新疆乌鲁木齐830046 [4]新疆农六师铝业有限公司,新疆五家渠831300

出　　处：《轻金属》2024年第7期49-54,共6页Light Metals

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

摘　　要：稀土微合金化是提升铝合金性能的重要手段之一,为了研究稀土元素Er对合金的具体作用,采用扫描电子显微镜(SEM)、差示扫描量热仪(DSC)、电子背散射衍射(EBSD)、透射电镜(TEM)和硬度等测试手段,研究了0.2%Er对Al-6.5%Cu合金性能的优化及其机理。结果显示,Er元素的引入降低了原有的晶粒择优取向现象,合金中织构的强度明显降低,有助于提高合金的塑性和韧性。同时Er元素促使晶粒细化,晶粒尺寸由60.10μm降低至23.8μm。在TEM测试中观察到棱柱状的Al 3Er粒子对位错具有阻碍作用,也观察到合金基体中出现均匀分布的细小弥散相,它可以促进时效过程中强化相的析出。添加Er元素后,不同状态的合金硬度也都有所提高。Rare earth microalloying is one of the important means to improve the properties of aluminum alloy.In order to study the specific effects of rare earth element Er on the alloy,scanning electron microscopy(SEM),differential scanning calorimetry(DSC),electron back scattering diffraction(EBSD),transmission electron microscopy(TEM)and hardness testing methods were used.The optimization mechanism of 0.2%Er on the properties of Al-6.5%Cu alloy was studied.The results show that the introduction of Er element reduces the original grain orientation and the texture strength of the alloy is significantly reduced,which is helpful to improve the ductility and toughness of the alloy.At the same time,Er element promotes grain refinement,and the grain size decreased from 60.10μm to 23.8μm.The prismatic Al 3Er particles were observed to inhibit the dislocation in TEM tests,and the uniform distribution of fine dispersed phase in the alloy matrix was also observed,which can promote the precipitation of the strengthened phase during aging.After adding Er element,the hardness of the alloy in different states is also increased.

关 键 词：Er元素 AL-CU合金 大变形量 固溶时效 

分 类 号：TF125.22[冶金工程—粉末冶金] TG146.2[冶金工程—冶金物理化学]