The γ" Phase in Mg-RE-TM Alloys: A Review on the Structure and Stability of the γ" Phase and Its Effect on Mechanical Properties

被引：1

作者：

Liu, Zhenyang ^{[1
]}

Pei, Zongrui ^{[2
]}

Zhou, Nan ^{[1
]}

Zheng, Kaihong ^{[1
]}

Chen, Bin ^{[3
]}

机构：

[1] Guangdong Acad Sci, Inst New Mat, Guangdong Prov Key Lab Met Toughening Technol & Ap, Guangzhou 510651, Peoples R China

[2] NYU, New York, NY 10003 USA

[3] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

来源：

METALS | 2023年 / 13卷 / 11期

关键词：

Mg-RE-TM alloys; phase; atomic structure; stability; mechanical property; AGE-HARDENING RESPONSE; GUINIER-PRESTON ZONES; GD-ZN; CREEP RESISTANCE; PRECIPITATION; STRENGTH; KINETICS; GROWTH; SHAPE; STEM;

D O I：

10.3390/met13111856

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In magnesium-rare earth-transition metal (Mg-RE-TM) alloys, the gamma" phase (with a hexagonal structure with the space group P6 over bar 2m) is a critical strengthening phase that can significantly improve their mechanical properties. However, compared to other phases in Mg-RE-TM alloys, research on the gamma" phase is less documented, and an understanding of the gamma" phase is not well established. As a result, different models of the structure of the gamma" phase have been proposed. In this review, we summarize these structural models and find that the gamma" phase is different from the Guinier-Preston (G.P.) zone, as revealed via Cs-corrected high-angle annular dark field-scanning transmission electron microscopy (HAADF-STEM) and density functional theory (DFT) calculations. In addition, we briefly summarize the stability of the gamma" phase and its effect on the mechanical properties of Mg-RE-TM alloys.

引用

页数：12

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