Cu对6082Al-Mg-Si合金时效初期析出相的影响  

Effect of Cu addition on precipitation phases at early stage in 6082 Al-Mg-Si alloy aged

作　　者：金曼[1] 邵光杰[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《中国有色金属学报》2009年第1期1-7,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50801044);上海大学创新基金资助项目;上海高校选拔培养优秀青年教师科研专项基金资助项目

摘　　要：采用透射电镜及三维原子探针研究元素Cu对6082Al-Mg-Si合金170℃时效初期GP区的影响。研究结果表明:添加元素Cu的Al-Mg-Si合金经170℃时效30min后在合金中形成了大量由Mg、Si和Cu3种元素组成的GP区,元素Cu的存在促进了合金时效初期GP区的形成,但并没有改变GP区中Mg和Si的摩尔比,Cu原子存在的GP区中Mg和Si的摩尔比仍然接近1。添加元素Cu的合金经170℃时效30min后,合金中还出现短针状的预β″相。The effect of Cu addition on the GP zones of 6082Al-Mg-Si alloy during the early stage of ageing at 170℃ was investigated by transmission electron microscope（TEM） and three-dimensional atom probe （3DAP）. The results show a great deal of GP zones including Mg, Si and Cu atoms form in the alloy with 0.6%Cu, which is aged at 170 ℃ for 30 min. The addition of Cu accelerates the forming of GP zones, but it does not change the mole ratio of Mg and Si in GP zone and the mole ratio of the GP zones is still close to 1. The shot needle-shaped pre-β″ precipitation appears in the alloy after Cu is aged at 170℃ for 30 min.

关 键 词：CU Al-Mg—Si合金 GP区 三维原子探针 析出相 

分 类 号：TG146.2[一般工业技术—材料科学与工程]