材料科学技术(英文版)2021，Vol.72Issue(13) ：104-113.

Composition optimization of high-strength Mg-Gd-Y-Zr alloys based on the structural unit of Mg-Gd solid solution

Rui Jiang Shengnan Qian Chuang Dong Ying Qin Yujuan Wu Jianxin Zou Xiaoqin Zeng
材料科学技术(英文版)2021，Vol.72Issue(13) ：104-113.
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Composition optimization of high-strength Mg-Gd-Y-Zr alloys based on the structural unit of Mg-Gd solid solution

Rui Jiang 1Shengnan Qian 1Chuang Dong 2Ying Qin 1Yujuan Wu 3Jianxin Zou 3Xiaoqin Zeng3
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作者信息

  • 1. Key Laboratory of Materials Modification (Ministry of Education), School of Material Science and Engineering, Dalian University of Technology, Dalian 116024, China
  • 2. Key Laboratory of Materials Modification (Ministry of Education), School of Material Science and Engineering, Dalian University of Technology, Dalian 116024, China;School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China
  • 3. National Engeering Research Center of Light Alloys Net Forming, School of Material Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
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Abstract

Mg-Gd-Y-Zr alloys with high strength fall within narrow composition range.The present paper explains their composition rule by establishing the cluster-plus-glue-atom unit ofGd-containing Mg solid solution with the aid of Mg matrix and MgsGd precipitate phase.First,based on the structural homologue between Gd-containing Mg solid solution and MgsGd precipitate phase and in combination with our previously established method for calculating the glue atoms,[Gd-Mg12]Mgs is obtained as the chemical unit of Gd-containing Mg solid solution.Then,seven compositions are designed using different combinations of this unit and that of pure Mg[Mg-Mg12]Mg3.After a systematic experimental investigation on the microstructure and mechanical property evolutions as a function of the unit proportions,it is revealed that the Mg-10.1Gd-3.3Y-0.9Zr alloy,being issued from equi-proportion mixing of the two units,shows the strongest tendency of precipitation and reaches the highest strength of 374 MPa after aging.The composition and strength of this alloy are quite close to GW103K which is well recognized for its general mechanical performance in Mg-Gd-Y-Zr system.

Key words

Mg-Gd solid solution/Chemical unit/Cluster-plus-glue-atom unit/Mg-Gd-Y-Zr cast alloys

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基金项目

This work is financially supported by the National Key Research and Development Program of China(2016YFB0701201)

Natural Science Foundation of China(11674045)

出版年

2021
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
被引量1
参考文献量1
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