| METALS AND METAL MATRIX COMPOSITES |
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| Study on Room Temperature Deformation Behavior of Magnesium-Bismuth Binary Alloy |
| WAN Yuhui1, SHI Fengjian2,*, HUO Qinghuan3, SONG Hongquan4, SU Hang5,*, LU Qingsong6, KUANG Jie1, LIU Gang1, ZHANG Jinyu1, SUN Jun1
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1 State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
2 School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
3 School of Materials Science and Engineering, Central South University, Changsha 410083, China
4 School of Physical and Telecommunication Engineering, Zhoukou Normal University, Zhoukou 466001, Henan, China
5 CNPC Tubular Goods Research Institute, Xi'an 710077, China
6 Zhejiang Yinlun Machinery Co., Ltd., Tiantai 317200, Zhejiang, China |
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Abstract Due to the high thermal stability of its second phase, Mg-Bi alloy have attracted some attention in the field of magnesium alloys research in recent years. In this work, quasi-in-situ tensile tests based on scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) were conducted, combined with crystal plasticity finite element simulation and first-principles calculations to explore the room-temperature plastic deformation behavior of Mg-Bi binary alloy. The results show that, under the condition of similar grain size and texture, Mg-Bi alloy exhibits superior room-temperature mechanical properties matching compared to pure Mg. Analysis indicate it is mainly due to the addition of element Bi, which reduce the generalized stacking fault energy of non-basal slip systems in the material and increase the activity of prismatic slip. This change causes the Mg-Bi alloy's strength increasing by 1.4 times compared to pure Mg's while maintaining almost the same elongation rate.
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Published: 10 January 2026
Online: 2026-01-09
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2026, Vol. 40 
