2524铝合金薄板平面各向异性研究  

Study on In-Plane Anisotropy of 2524 Aluminum Alloy Sheet

作　　者：郭加林[1] 尹志民[1] 商宝川[1] 聂波[2] 何振波[1,2] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]东北轻合金有限责任公司,哈尔滨150060

出　　处：《航空材料学报》2009年第1期1-6,共6页Journal of Aeronautical Materials

基　　金：国家“973”重点基础研究项目(G2005CB623705)

摘　　要：采用室温拉伸性能测试、金相组织观察、XRD反极图测定和透射电子显微分析等方法研究了冷轧态和T3态2mm厚2524铝合金薄板不同取向条件下的显微组织和拉伸力学性能。以{110}<112>单组分织构模型为基础,研究了织构与平面各向异性的关系。结果表明,2524冷轧态和T3态铝合金薄板在与轧制方向成45°和60°方向上的强度较0°、30°和90°方向上的强度低,延伸率则是45°方向上最高;轧向力学性能优于横向力学性能;冷轧态合金薄板的平面各向异性高于T3态合金板材;2524冷轧态合金薄板的主要织构为{110}<112>,次要织构为{311}<112>;2524-T3态铝合金成品薄板的主要织构为{110}<001>;2524铝合金薄板的平面各向异性与合金的晶粒结构以及晶体学织构密切有关,其中晶体学织构是造成合金板材平面各向异性的主要原因。The microstructures and tensile properties of cold-rolled and T3 treated 2524 aluminum alloy sheet with the thickness of 2mm at different orientation were investigated by tensile test, OM, XRD and TEM analysis. On the basis of the model that regards the sheet containing only { 110 } 〈 112 〉 texture, the relationship of in-plane anisotropy and the anisotropy of crystallography was analyzed. The results show that the strength of 2524 cold-rolled and T3 sheet orientated 45° and 60° with respect to the rolling direction is lower than that of specimens orientated 0° , 30° and 90° with respect to the rolling direction. The elongation of the sheet orientated 45° with respect to the rolling direction is highest, And then the tensile properties of the sheet orientated 0° with respect to the rolling direction are both higher than that of the sheet orientated 90° with respect to the rolling direction. The IPA of cold-rolling condition alloy sheet is higher than that of T3 condition. The major crystallographic texture of 2524 cold-rolled sheet is { 110} 〈 112 〉 , and the secondary crystallographic texture is { 311 } 〈 112 〉. But the major crystallographic texture of 2524-T3 condition is { 110 } 〈 001 〉. The in-plane anisotropy of mechanical properties of 2524 aluminum alloy sheet is closely related to the grain structure and crystallography orientation, among them crystallographic texture is responsible for the in-plane anisotropy of mechanical properties.

关 键 词：2524铝合金 力学性能 平面各向异性 反极图 晶体织构 

分 类 号：TG146.2[一般工业技术—材料科学与工程]