Mg-10mass%Gd系およびMg-10mass%Dy系合金の時効特性と高温引張特性に及ぼすY,Nd添加の影響
Mg-10mass%Gd系およびMg-10mass%Dy系合金の時効特性と高温引張特性に及ぼすY,Nd添加の影響
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DOI：
10.2464/jilm.44.549
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发表时间：
1994-10
期刊：
影响因子：
--
通讯作者：
祐司 根岸;秀紀 岩澤;重晴 鎌土;陽 小島;隆二 二宮
中科院分区：
文献类型：
--
作者：
祐司 根岸;秀紀 岩澤;重晴 鎌土;陽 小島;隆二 二宮
Mg-10mass%Gd和Mg-10mass%Dy合金具有较高的高温强度和良好的延展性。为了提高合金的高温强度和降低材料成本，本研究分别在二元合金中添加1或2mass%的Y或Nd，并研究了这三种合金元素对合金的时效特性和高温拉伸性能的影响。在Mg-10mass%Gd或Dy合金中添加Y或Nd可促进高温时效析出硬化。发现添加钕对提高强度非常有效。结果表明，Mg-10mass%Gd-2mass% Nd合金在200℃以上的高温条件下，其强度优于传统的耐热镁合金和铝合金。
Mg-10mass%Gd and Mg-10mass%Dy alloys have high strength at high temperatures and exhibit good ductility. In this study, 1 or 2mass%Y or Nd was added to these binary alloys in order to increase high temperature strength and reduce the material cost, and the effect of the third alloying elements on their aging characteristics and high temperature tensile properties were investigated. Additions of Y or Nd to Mg-10mass%Gd or Dy alloys promote remarkable precipitation hardening by aging at high temperatures. Nd addition is found to be very effective to increase strength. It is clear that the Mg-10mass%Gd-2mass% Nd alloy exhibits the highest strength among investigated alloys and its strength is superior to that of the conventional heat resistant magnesium and aluminum alloys at temperatures higher than 200°C.