Microstructure and mechanical properties of Mg-7.71Gd-2.39Nd-0.17Zr alloy after the different heat treatments

Shifeng Luo, Guangyu Yang, Lei Xiao, Wanqi Jie

科研成果: 书/报告/会议事项章节会议稿件同行评审

2 引用 (Scopus)

摘要

Microstructure and mechanical properties of Mg-7.71Gd-2.39Nd-0.17Zr alloy after different heat treatments were investigated. The microstructure of the as-cast alloy was composed of α-Mg matrix, bone-shaped α-Mg + β-Mg5(Gd, Nd) eutectic, a little amount of small cuboid phase (GdH2) and Zr-rich cluster within α-Mg matrix. The optimal solution treatment was determined to be at 515 °C for 4 h. After solution treatment, bone-shaped α-Mg + β-Mg5(Gd, Nd) eutectic was almost dissolved into α-Mg matrix and the grain size increased slightly. Furthermore, a large amount of GdH2was precipitated along the grain boundaries and within α-Mg matrix. After subsequent aging treatment at 200 °C for 32 h, Mg5Gd phases were precipitated along the grain boundaries. For the peak-aged alloy, the peak hardness of 105 HV was achieved and the ultimate tensile strength, yield strength and elongation at room temperature were up to 273.7, 188.2 MPa and 4.1%, respectively, which may be mainly attributed to the β″ and β′ phase precipitated within α-Mg matrix after ageing treatment.

源语言英语
主期刊名Magnesium Technology 2018
编辑Kiran N. Solanki, Vineet Joshi, Neale R. Neelameggham, Dmytro Orlov
出版商Springer International Publishing
237-243
页数7
ISBN(印刷版)9783319723310
DOI
出版状态已出版 - 2018
活动International Symposium on Magnesium Technology, 2018 - Phoenix, 美国
期限: 11 3月 201815 3月 2018

出版系列

姓名Minerals, Metals and Materials Series
Part F7
ISSN(印刷版)2367-1181
ISSN(电子版)2367-1696

会议

会议International Symposium on Magnesium Technology, 2018
国家/地区美国
Phoenix
时期11/03/1815/03/18

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