Insight on the correlation between bimodal-sized grain structure and tensile properties of extruded low-alloyed Mg-Sn-Bi-Mn alloy

被引：24
作者：
Guo, Zhen-yu [1 ]
Cheng, Wei-li [1 ,2 ]
Wang, Hong-xia [1 ,2 ]
Yu, Hui [3 ]
Niu, Xiao-feng [1 ,2 ]
Wang, Li-fei [1 ,2 ]
Li, Hang [1 ]
Hou, Hua [4 ]
机构：
[1] Taiyuan Univ Technol, Sch Mat Sci & Engn, Taiyuan 030024, Peoples R China
[2] Taiyuan Univ Technol, Key Lab Interface Sci & Engn Adv Mat, Minist Educ, Taiyuan 030024, Peoples R China
[3] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300132, Peoples R China
[4] North Univ China, Sch Mat Sci & Engn, Taiyuan 030051, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2022年 / 843卷
基金：
中国国家自然科学基金;
关键词：
Mg -Sn -Bi based alloy; Extrusion; Bimodal-sized grain structure; Tensile properties; Strengthening mechanism; MECHANICAL-PROPERTIES; HIGH-STRENGTH; DEFORMATION-BEHAVIOR; MICROSTRUCTURE; EXTRUSION; CA; EVOLUTION; DUCTILITY; TEXTURE;
D O I：
10.1016/j.msea.2022.143128
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study, a novel low-alloyed Mg-2Sn-2Bi-0.2Mn (wt.%) alloy is designed and extruded successfully at 523 K. Microstructural analysis reveals that a bimodal-sized grain structure is obtained due to the abnormal dynamic recrystallized (DRXed) grain growth. The results indicate that the studied alloy exhibits a good balance between strength and ductility with a tensile yield strength (TYS) of 299.7 MPa, an ultimate tensile strength (UTS) of 382.6 MPa, and an elongation (EL) of 21.2%. Besides, the underlying strengthening mechanism and ductility enhancement are analyzed and discussed in terms of bimodal-sized grain structure.
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页数：8
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