摘要
The effects of rare earth(RE)elements Y and Nd(w(Y)/w(Nd)=3-2)with total content of 1%-4%on microstructures and elevated temperature mechanical properties of AZ81 magnesium alloy were investigated.The results show that,proper content of rare earth elements makes the microstructures of AZ81 magnesium alloy refine obviously and the quantity ofβ-Mg17Al12 phases reduce,and Al2Y and Al2Nd form.After solid solution treatment,with increasing content of rare earth elements,the tensile strength and elongation of the alloys(at room temperature,150 ℃and 250℃)increase first,then decrease.When the content of rare earth elements is up to 2%,the values of tensile strength at room temperature and 150 ℃are up to their maxima simultaneously,282 MPa and 212 MPa,respectively.Meanwhile,the values of elongation at room temperature and at elevated temperature are also up to their maxima,13%and 15%,respectively.
The effects of rare earth（RE） elements Y and Nd （w（Y）/w（Nd）=3：2） with total content of 1%-4% on microstructures and elevated temperature mechanical properties of AZ81 magnesium alloy were investigated. The results show that, proper content of rare earth elements makes the microstructures of AZ81 magnesium alloy refine obviously and the quantity offl-MglTAll2 phases reduce, and Al2Y and Al2Nd form. After solid solution treatment, with increasing content of rare earth elements, the tensile strength and elongation of the alloys （at room temperature, 150 ℃ and 250 ℃） increase first, then decrease. When the content of rare earth elements is up to 2%, the values of tensile strength at room temperature and 150 ℃ are up to their maxima simultaneously, 282 MPa and 212 MPa, respectively. Meanwhile, the values of elongation at room temperature and at elevated temperature are also up to their maxima, 13% and 15%, respectively.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2008年第2期303-308,共6页
Transactions of Nonferrous Metals Society of China
关键词
微观结构
机械性能
镁合金
钕
AZ81 magnesium alloy
rare earth
yttrium
neodymium
microstructure
mechanical properties
