2024、2524合金和含微量Sc、Zr的2524铝合金板材的组织和性能  

Research on microstructure and properties of 2024、2524 alloy and 2524 alloy with minor scandium and zirconium hot rolled plate

作　　者：王华[1] 尹志民[1] 钟利[2] 郭加林[1] 彭小芒[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]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》2008年第11期30-33,共4页Light Alloy Fabrication Technology

基　　金：国家重点基础研究发展计划(973项目,2005CB623705)

摘　　要：制备了含微量Sc、Zr的2524铝合金板材,采用拉伸力学性能测试、金相、X射线衍射和透射电子显微分析技术,比较研究了2024、2524合金和含微量Sc、Zr的2524铝合金板材的组织和性能。结果表明,微量Sc和Zr在2524铝合金中主要以次生的Al3(Sc,Zr)粒子形式存在,这种粒子与基体共格,钉扎位错和亚晶界,高温固溶处理过程中仍然能够部分抑制合金的再结晶。在T3状态下,含Sc、Zr的2524铝合金的塑性与2524铝合金的相当,而屈服强度提高了18 N/mm2。微量Sc、Zr对Al-Cu-Mg合金的强化作用主要来源于添加微量Sc、Zr引起的细晶强化、亚结构强化和析出强化。2524 alloy hot rolled plate with minor scanium and zirconium was prepared, the microstructure and properties of 2024, 2524 and 2524 alloy hot wiled plate with minor scandium and zirconium was comparatively studied though tensile properties measurement, OM, XRD and TEM. The results show that minor Sc, Zr exist in the 2524 alloy in the form of secondary Al3 （Sc, Zr） particle, this particle is coherence with matrix, it can pin the dislocation and sub-boundary, and partly inhibit the recrystallization of the alloy during high-temperature solution. At T3 condition, the ductility of 2524 alloy with minor Sc and Zr is similar to 2524 alloy, but yield strength of the alloy with minor Sc and Zr raised by 18 N/mm2 . Fine grain strengthening, substructure strengthening and precipitation strengthening is responsible for the increase of the yield strength.

关 键 词：Al—Cu—Mg合金 SC ZR 组织 性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]