Tailoring the microstructural characteristics and enhancing creep properties of as-cast Mg-5Bi-5Sn alloy through Mn addition

被引：0

作者：

Yi-hao Luo ^{[1
]}

Wei-li Cheng ^{[1
,2
]}

Hui Yu ^{[3
]}

Hong-xia Wang ^{[1
,2
]}

Xiao-feng Niu ^{[1
,2
]}

Li-fei Wang ^{[1
,2
]}

Hang Li ^{[1
]}

Zhi-yong You ^{[1
]}

Hua Hou ^{[4
]}

机构：

[1] School of Materials Science and Engineering, Taiyuan University of Technology

[2] Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of Education, Taiyuan University of Technology

[3] School of Materials Science and Engineering, Hebei University of Technology

[4] School of Materials Science and Engineering, North University of China

来源：

Journal of Magnesium and Alloys | 2023年 / 09期

基金：

中国国家自然科学基金;

关键词：

D O I：

暂无

中图分类号：

TG146.22 [];

学科分类号：

080502 ;

摘要：

The creep properties, microstructural characteristics and creep mechanisms of as-cast Mg-5Bi-5Sn(BT55) alloy without and with Mn(BTM550) addition were investigated via creep at 423, 448, and 473 K as well as stresses of 30, 50 and 75 MPa. The results indicate that adding Mn can result in the formation of primary and the dynamic precipitated α-Mn phases. In addition, the morphology of the precipitated Mg3Bi2phase and the orientation relationship between Mg2Sn precipitates and α-Mg can be effectively modified. Tailoring the microstructural characteristics is responsible for the improved creep performance of BTM550 alloy. The dominant creep mechanisms in BT55 and BTM550 alloys are dislocation cross-slip and climb, respectively. Furthermore, twinning and pyramidal <c + a> slip play an assisting part in both alloys during creep process.

引用

页码：3350 / 3361

页数：12

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