Sc对Al－Li－Cu－Mg－Zr合金组织与性能的影响  

EFFECT OF Sc ON MICROSTRUCTURE AND PROPERTIES OF Al-Li-Cu-Mg-Zr ALLOY

作　　者：蒋晓军[1] 李依依 桂全红 马禄铭[1] 梁国军[1] 师昌绪[1] 

机构地区：[1]中国科学院金属研究所

出　　处：《金属学报》1994年第8期A355-A361,共7页Acta Metallurgica Sinica

基　　金：国家自然科学基金

摘　　要：研究了Ｓｃ对Ａｌ—Ｌｉ—Ｃｕ—Ｍｇ—Ｚｒ合金的显微组织与拉伸性能的影响。结果表明，δ′（Ａｌ３Ｌｉ）和Ｓ′（Ａｌ２ＣｕＭｇ）仍为含Ｓｃ合金中的主要强化相，Ｓｃ细化了合金的晶粒，降低了δ′颗粒的长大速度，促进Ｓ′相的析出和均匀弥散分布，还使合金析出Ａｌ３Ｓｃ颗粒和Ａｌ３Ｌｉ／Ａｌ３Ｓｃ复合析出相颗粒，这两种颗粒都有益于合金的性能。因此，加入Ｓｃ后合金表现出良好的强塑性配合。The effect of Sc on microstructure and tensile properties of Al-Li-Cu-Mg-Zr alloy has been studied. The results show that the δ′(Al3Li) and S′(Al_2CuMg) are main strengthening phases in the alloys-Addition of Sc may refine the grain size, reduce the coarsening rate of δ′particles and accelerate the precipitation and uniform distribution of S′phase obviously. Al_3Sc particles and composite Al_3Li / Al_3Sc particles precipitate in the Sc-containing alloys, they are beneficial to the improvement of properties. So,the Sc significantly increases the strength of the alloy, and results in superior combinations of strength and ductility.

关 键 词：铝锂合金 硒 显微组织 力学性质 

分 类 号：TG146.2[一般工业技术—材料科学与工程]