超高强Al-6.5Zn-2.4Mg-2.3Cu-0.12Zr合金厚板各向异性分析  

Analysis on anisotropy of super high strength Al-6.5Zn-2.4Mg-2.3Cu-0.12Zr alloy plate

作　　者：丛福官[1] 任伟才[1] 吴沂哲 张磊[1] CONG Fu-guan;REN Wei-cai;WU Yi-zhe;ZHANG Lei(Northeast Light Alloy Co.,Ltd.,Harbin 150060,China)

机构地区：[1]东北轻合金有限责任公司,黑龙江哈尔滨150060

出　　处：《轻合金加工技术》2022年第6期31-36,共6页Light Alloy Fabrication Technology

摘　　要：采用拉伸试验、金相分析、EBSD分析等方法研究了80 mm厚的Al-6.5Zn-2.4Mg-2.3Cu-0.12Zr合金板材不同厚度的组织和性能。研究结果表明:试验合金厚板不同厚度层的力学性能明显不一致,板材厚度心部的强度明显高于表层的强度,并且表层强度出现纵向强度明显低于横向强度的反常平面各向异性现象;厚板的表层晶粒的纤维状组织特征比心部的明显,再结晶组织多,亚结构组织少;表层具有较强的R-Cube织构,心部有较强的Brass和Copper织构;不同厚度层的织构组分和织构强度反应出M(泰勒因子)值从表层至中心层逐渐增大,验证了试验合金厚板中心层的强度高于表层的强度。Microstructure and properties at different thickness layers of the 80 mm thick Al-6.5 Zn-2.4 Mg-2.3 Cu-0.12 Zr alloy plate were studied by tensile test, metallographic analysis and EBSD analysis. The research results show that the mechanical properties at different thickness layers of the test plate are obviously different. The strength at the core layer is obviously higher than that at the surface layer. The abnormal plane anisotropy of the surface layer strength appears that the longitudinal strength is obviously lower than the transverse strength. The fibrous structure at the surface layer grains of the plate is more obvious than that at the core layer, the recrystallization structure is more, while the substructure is less. The surface layer has strong R-Cube texture, and the core has strong Brass and Copper texture. The texture composition and texture strength at different thickness layers reflect that the M(Taylor factor) value increases gradually from the surface layer to the core layer, which verifies that the strength at the core layer of the test plate is higher than that at the surface layer.

关 键 词：Al-6.5Zn-2.4Mg-2.3Cu-0.12Zr合金 各向异性 力学性能 显微组织 织构 

分 类 号：TG146.21[一般工业技术—材料科学与工程]