摘要
通过正交实验确定了具有较高强度和塑性的Ｍｇ－７Ｌｉ－１４Ｚｎ合金中Ａｇ、Ｎｄ、Ｌａ和Ｃｅ的最优添加量，比较了其不同强化效果，并指出正交最优合金力学性能。通过ＴＥＭ组织观察，确定了各合金元素的析出相分别为Ｍｇ３Ａｇ、Ｍｇ１７Ｌａ２、Ｍｇ１７Ｃｅ２和Ｍｇ３Ｃｅ，而Ｎｄ则固溶于α相中形成固溶强化。
The result of the orthogonal experiments indicates that Ag has the greatest effect on the strength of Mg-7Li-14Zn alloy, and the optimium quantities of additives are 1.6%Ag, 1.1%～1.3%Nd, 0.4%～0.6%La, 0.8%～1.0%Ce(wt), respectively. In this composition(ρ=1.694g/cm 3), the mechanical properties of the alloy are σ b= 405.1MPa, σ 0.2 =201.1MPa, δ=8.98%, after 370℃×1hr solid solution, water quenching, and 20hrs aging at 38℃. When Ag, Nd, La and Ce are added to the ternary alloy, Mg 3Ag, Mg 17 La 2, Mg 17 Ce 2 and Mg 3Ce phases are formed respectively, and Nd dissolves in α phase resulting in solid solution strengthening.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
1997年第4期9-13,,19,,共6页
Ordnance Material Science and Engineering
基金
国家教委博士点基金
关键词
力学性能
镁锂锌合金
稀土
银
显微组织
Mg-Li-Zn alloy, mechanical properties, precipitation phases Correspondent: Le Qichi, P. O. Box 317, Department of Metal Forming, School of Material and Metallurgy, Northeastern University, Shenyang, Liaoning 110006
