摘要
通过DSC差热分析、光学显微镜、扫描电镜和EDS能谱分析研究了不同含量Er(铒)对Al-Mg-Si-Cu合金的铸态、均匀化组织的影响。结果表明:Er可以明显细化Al-Mg-Si-Cu合金的铸态组织。添加w(Er)=0.4%,合金的晶粒细化效果较好;添加w(Er)<0.4%时,合金的初熔温度和熔化温度没有明显变化;添加w(Er)=0.6%时,合金的初熔温度和熔化温度分别提高8℃和6℃。均匀化过程中析出了大量十分细小的析出相,均匀分布在晶内。Al-MgSi-Cu合金均匀化组织中晶界残留相主要为AlCuSi相和CuAl2相。添加w(Er)=0.6%后,合金均匀化组织中晶界残留相主要是ErAl3相和AlMnFeSi相。
The effect of different Er contents on as-cast and homogeneous microstructures of Al-Mg-Si-Cu alloy was studied by DSC,optical microscopy,scanning electron microscopy and EDS. The results show that Er can refine as-cast grain of Al-Mg-Si-Cu alloy obviously and that the best grain refinement can be reached when w( Er)= 0.4%. When w(Er)< 0.4%,the initial melting temperature and melting temperature of the alloy do not change significantly. When w( Er)= 0.6%,the initial melting temperature and melting temperature of the alloy increase by 8℃ and 6℃,respectively.A large number of very fine precipitates distribute uniformly in grains during homogenization.The residual constituents are mainly AlCuSi and CuAl2 in homogenized Al-Mg-Si-Cu alloy and are mainly ErAl3 and AlMnFeSi in the homogenized 0.6Er alloys.
作者
董宇
宁庆波
费文慧
何立子
DONG Yu;NING Qing-bo;FEI Wen-hui;HE Li-zi(Institute of New Material Technology,Northeastern University,Shenyang 110819,China;Key Lab of Electromagnetic Processing of Material,Northeastern University,Shenyang 110819,China;College of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)
出处
《轻合金加工技术》
CAS
北大核心
2019年第7期15-19,33,共6页
Light Alloy Fabrication Technology
基金
国家自然科学基金资助(项目号51574076)
