A Novel Mg-CaMgSn Master Alloy for Grain Refinement in Mg-Al-Based Alloys

被引：5

作者：

Zhang, Jianyue ^{[1
]}

Zhou, Guanyu ^{[2
]}

Jiang, Bin ^{[2
,3
]}

Luo, Alan ^{[1
,4
]}

Zhao, Xuzhe ^{[5
]}

Tang, Aitao ^{[2
,3
]}

Pan, Fusheng ^{[2
,3
]}

机构：

[1] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA

[2] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China

[3] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China

[4] Ohio State Univ, Dept Integrated Syst Engn, Columbus, OH 43210 USA

[5] Bollhoff Inc, Troy, MI 48084 USA

来源：

METALS | 2021年 / 11卷 / 11期

关键词：

casting; grain refinement; magnesium alloys; solidification; MAGNESIUM ALLOY; MECHANICAL-PROPERTIES; MICROSTRUCTURE; BEHAVIOR; CA; ADDITIONS;

D O I：

10.3390/met11111722

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel grain refinement method using a CaMgSn intermetallic phase was investigated via adding a Mg-CaMgSn master alloy to an AZ31 magnesium alloy. The results showed a remarkable grain refinement effect in as-cast AZ31, with the average grain size reduced from approximately 260-93 mu m after adding 0.45 wt.% CaMgSn particles. The added CaMgSn phase was found in grain interiors and acted as heterogeneous nucleation sites during solidification. The edge-to-edge matching model confirmed a low mismatch value of 2.3% for the {0002}(Mg)/{211}(CaMgSn) close-packed plane, suggesting that {211}(CaMgSn) was the possible matching plane for Mg nucleation. The microhardness and compressive yield strength were also improved by adding CaMgSn particles, confirming that adding Mg-CaMgSn master alloy was an effective method for refining the microstructure and improving the mechanical properties of Mg-Al-based alloys.

引用

页数：10

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