In-situ EBSD analysis of microstructural evolution and damage behavior of Mg-Al-Ca-Mn alloys with different extrusion ratios

被引：11
作者：
Huang, Weiying [1 ,2 ]
Jiang, Zhen [1 ]
Wu, Yuanzhi [3 ]
Zhang, Ruizhi [3 ]
Qiu, Wei [1 ]
Li, Cong [1 ]
Li, Wei [1 ]
Chen, Jian [1 ]
机构：
[1] Changsha Univ Sci & Technol, Sch Energy & Power Engn, Key Lab Efficient & Clean Energy Utilizat, Changsha 410114, Peoples R China
[2] Hunan 3T New Mat Co Ltd, Loudi 417000, Peoples R China
[3] Hunan Inst Technol, Res Inst Automobile Parts Technol, Hengyang 421002, Hunan, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2023年 / 199卷
基金：
中国国家自然科学基金;
关键词：
Magnesium alloys; Microstructure; Texture; Damage behaviors; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; FATIGUE DAMAGE; MAGNESIUM; TEXTURE; DEFORMATION; DUCTILITY; SLIP; COMPRESSION; CRACK;
D O I：
10.1016/j.matchar.2023.112781
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, the Mg-3Al-0.4Ca-0.7Mn (wt%) alloys with three extrusion ratios were produced via hot extrusion. The microstructure and damage behaviors of the alloy were studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM), electron backscattered diffraction (EBSD), and in-situ tensile testing. As the extrusion ratio increased, the texture component was gradually deflected from ED to TD owing to the formation of twins, which resulted in slightly different types of extruded fiber texture. Two kinds of typical damage behaviors were observed in the alloy. One type of crack initiation sites occurred due to twinning-induced grain damage in the specimen with an extrusion ratio of 10. The high-density non-basal dislocations-induced damage predominated the other sample lack of twins with the extrusion ratio of 25. According to the results, the deformation mode and damage behavior in the second case endowed the alloy with the best strength and ductility.
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页数：17
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