微量铒对Al-6.0%Zn-2.0%Mg-1.5%Cu合金组织与性能的影响  

Effects of Trace Erbium on Microstructure and Properties of Al-Zn-Mg-Cu Alloys

作　　者：刘莹颖[1] 夏长清[1] 彭小敏[1] 张志高[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《矿冶工程》2008年第6期101-103,共3页Mining and Metallurgical Engineering

基　　金：湖南省自然科学基金资助项目(06JJ4111)

摘　　要：采用铸锭冶金法制备了含铒0%、0.4%、0.6%的Al-Zn-Mg-Cu合金,用金相显微镜、扫描电镜、能谱分析以及透射电镜研究了Er对合金的组织及性能的影响。试验结果表明,含Er合金在凝固过程中形成一次Al3Er相,该相与α(Al)基体具有相同的晶体结构,晶格常数接近,可以有效的细化合金晶粒,提高合金的抗拉强度,在T6状态下含0.4%Er的2#合金抗拉强度为577.12 MPa,屈服强度为514.96 MPa,延伸率为11.8%。Three kinds of AI-Zn-Mg-Cu based alloys with 0%, 0.4% and 0.6% Er respectively were produced by ingot metallurgic process. The influences of erbium on the microstructure and properties of the AI-Zn-Mg-Cu alloys were studied by optical microscope, scanning electron microscope, energy spectrum analysis and transmission electron microscope. The results showed that during the solidification of the Er-bearing alloys Al3Er phase formed once, which had the same crystal structure as α（AI） phase and a lattice constant similar to that of the later. It could greatly decrease the alloys＇ grain size and improve their tensile strength. Under T6 condition, the alloy with 0. 4% Er had tensile strength of 577.12 MPa, yield strength of 514.96 MPa and specific elongation of 11.8%.

关 键 词：铒 A1-Zn-Mg-Cu合金 显微组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]