Diffusion behaviour and mechanical properties of binary Mg-Gd system

被引：29

作者：

Yang, Li ^{[1
,2
]}

Yuan, Yuan ^{[1
,2
,4
]}

Chen, Tao ^{[1
,2
]}

Dai, Xu ^{[1
]}

Zhang, Ling ^{[3
,4
]}

Li, Dajian ^{[6
]}

Tang, Aitao ^{[1
,2
]}

Yi, Wang ^{[5
]}

Zhang, Lijun ^{[5
]}

Pan, Fusheng ^{[1
,2
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China

[3] Chongqing Univ, Coll Mat Sci & Engn, Electron Microscopy Ctr, Chongqing 400044, Peoples R China

[4] Chongqing Univ, Coll Mat Sci & Engn, Int Joint Lab Light Alloys, Minist Educ, Chongqing 400044, Peoples R China

[5] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China

[6] Karlsruhe Inst Technol, Inst Appl Mat Appl Mat Phys IAM AWP, D-76344 Karlsruhe, Germany

来源：

INTERMETALLICS | 2021年 / 133卷 / 133期

基金：

中国国家自然科学基金;

关键词：

Mg-Gd system; Intermetallic compounds; Diffusion; Mechanical properties; MAGNESIUM ALLOYS; THERMODYNAMIC PROPERTIES; ELASTIC PROPERTIES; PHASE; HARDNESS; INDENTATION; AL; INTERDIFFUSION; MICROSTRUCTURE; PRECIPITATION;

D O I：

10.1016/j.intermet.2021.107171

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Diffusion behaviour of Mg-Gd intermetallic compounds (IMCs) were studied in the temperature range of 713-793 K using the diffusion couple method. Measured growth constants and integral interdiffusion coefficients of formed IMCs showed inverse-correlation to melting temperatures, excluding metastable phase Mg7Gd. Mechanical properties of obtained IMCs were studied using nanoindentation characterization technique and first principles calculations. The experimental measured nano-hardness of Mg5Gd, Mg3Gd and Mg2Gd are 4.11 GPa, 4.05 GPa and 4.72 GPa, respectively, nearly twice of that of alpha (Mg). The obtained kinetic and mechanical information of Mg-Gd system is the basis for the development of high-strength Mg-Gd based Mg alloys.

引用

页数：12

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