Al_6CuMg_4准晶形核剂对铝合金凝固组织的影响  

Effect of Al_6CuMg_4 quasicrystal nucleating agents on solidification structure of aluminium alloy

作　　者：梁钰[1] 石逸扬 王琛[1] 肖文豪[1] 艾延龄[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：《金属热处理》2015年第11期33-36,共4页Heat Treatment of Metals

摘　　要：在铝合金的熔炼过程中加入Al6Cu Mg4准晶形核剂,经热处理后,在透射电子显微镜下观察其显微结构。研究发现合金中存在两种析出相:一种是Al-Cu-Mg系合金中常见的S相,但其在电子束照射下发生了结构变化;另一种析出相的结构尚未定论。此外,在合金中还发现了呈十次对称排列的微畴。Quasicrystal nucleating agent Al6 Cu Mg4was added in the process of aluminium alloy melting,the microstructure was observed after heat treatment with transmission electron microscope.The results show that there are two kinds of precipitates in the alloy：one is the common S phase in the Al-Cu-Mg alloys,however,a structural change occurs under the electron beam exposure;another is an undifned precipitate.In addition,some micro-domain with ten-fold symmetry was found.

关 键 词：准晶 AL-CU-MG合金 显微结构 析出相 

分 类 号：TG162.83[金属学及工艺—热处理]