Effects of trace Ca addition on microstructure and mechanical properties of as-cast Mg-Sm-Gd-based alloy

被引：14

作者：

Guan, Kai ^{[1
,2
]}

Zhang, Jing-huai ^{[1
]}

Yang, Qiang ^{[2
]}

LI, Bai-shun ^{[3
]}

Wu, Rui-zhi ^{[1
]}

Meng, Jian ^{[2
]}

机构：

[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China

[3] Changchun Inst Technol, Sch Mech & Automot Engn, Changchun 130012, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2023年 / 33卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Mg-Sm-Gd alloy; Ca; microstructure characterization; mechanical properties; transmission electron microscopy (TEM); GRAIN-REFINEMENT; ZN ADDITIONS; PRECIPITATION; EVOLUTION; SAMARIUM; PHASE; SOLIDIFICATION; TEXTURE;

D O I：

10.1016/S1003-6326(22)66089-8

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effects of trace amounts of Ca on the microstructure and mechanical properties of as-cast Mg-Sm- Gd-Zn-Zr alloy were systematically investigated mainly by means of transmission electron microscopy (TEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and tensile test. The results reveal that the dominant intermetallic compound in Mg-Sm-Gd-Zn-Zr alloy is Mg3RE phase with significant enrichment of Zn. The addition of Ca in Mg-Sm-Gd-Zn-Zr alloy can not only refine grains, but also promote the formation of Mg5RE phase and solute-enriched stacking faults (SESFs). The coherent interface indicates that Mg3RE phase can act as the nucleation site of Mg5RE phase. Finally, the decreased grain size and the formation of Mg5RE phase and SESFs in the Ca-modified alloy are beneficial to the enhancement of mechanical properties.

引用

页码：46 / 58

页数：13

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