占亮.高强耐热Mg-4.5Gd-2.6Nd-0.5Zn-0.5Zr合金[J].稀有金属材料与工程,2020,49(8):2644~2648.[占亮.High-strength and heat-resistant of Mg-4.5Gd-2.6Nd-0.5Zn-0.5Zr alloy[J].Rare Metal Materials and Engineering,2020,49(8):2644~2648.]
高强耐热Mg-4.5Gd-2.6Nd-0.5Zn-0.5Zr合金
投稿时间:2019-05-27  修订日期:2019-09-23
中文关键词:  Mg–4.5Gd–2.6Nd–0.5Zn–0.5Zr合金,显微组织,力学性能
基金项目:
中文摘要:
      新型Mg-4.5Gd-2.6Nd-0.5Zn-0.5Zr铸造合金的显微组织和力学性能进行了研究。发现了合金的铸态组织由近等轴晶,Mg12(Nd,Gd)和Mg3Gd合金组成。通过最优化热处理后,合金的常温和高温 250℃时的 屈服强度 , 抗拉强度 和延伸率分别为 205MP, 320MP和 4.0%;145MP, 245MP 和 18.5% 。合金的强化原则在文中做了叙述。合金常温下断裂为脆性断裂,高温下为韧性断裂。高温下断裂特征具有很多韧窝和撕裂脊。
High-strength and heat-resistant of Mg-4.5Gd-2.6Nd-0.5Zn-0.5Zr alloy
英文关键词:Mg–4.5Gd–2.6Nd–0.5Zn–0.5Zr alloys  microstructure  mechanical properties
英文摘要:
      The microstructures and mechanical properties of Mg-4.5Gd-2.6Nd-0.5Zn-0.5Zr new casting magnesium alloy were researched.It is found that the microstructure of the as-cast experimental alloy is composed of near equiaxed α-Mg, Mg12(Nd,Gd) and Mg3Gd phases. After optimizing the heat treatment parameters, the value of YS , UTS and A reach 205MP, 320MP and 4.0% at room temperature 145MPa,245MPa and 18.5% at 250℃.The strengthening principle of the alloy is studied in this paper. The fracture surfaces of Mg-4.5Gd-2.6Nd-0.5Zn-0.5Zr alloy was brittle fracture at room temperature tensile with and ductile fracture at 250℃ tensile with lots of dimples and tear ridges.
作者单位E-mail
占亮 沈阳铸造研究所有限公司 srifal@163.com 
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