Deformation behavior and microstructure of pure Mg during hot shear-compression

被引：2

作者：

Zhao, Chen ^{[1
,2
,3
]}

Jing, Lei ^{[2
,3
]}

Xu, Bowen ^{[3
]}

Liang, Lisi ^{[1
]}

Zhang, Tao ^{[4
]}

机构：

[1] School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an,710055, China

[2] Northwest Nonferrous Metal Baoji Innovation Research Institute, Baoji,721000, China

[3] Shaanxi Key Laboratory of Biomedical Metal Materials, Northwest Institute for Non-ferrous Metal Research, Xi'an,710016, China

[4] Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing,100191, China

来源：

Materials Letters | 2024年 / 368卷

关键词：

Magnesium - Metal extrusion - Surface defects - Textures;

D O I：

10.1016/j.matlet.2024.136695

中图分类号：

学科分类号：

摘要：

In this study, the deformation behavior and microstructure evolution of pure Mg under hot shear-compression deformation conditions are investigated using the Shear-Compression Specimen as a model, which provides theoretical guidance for the investigation of the principles of surface defects in the hot extrusion process. The results showed low flow stress corresponded to a high temperature and a low strain rate, temperatures between 350–450 °C and strain rate at 5 s−1 are the perfect hot deformation parameters. The deformation generates a special texture that is bent by 45° along the extrusion direction, weakening the strong basal texture structure created by extrusion. The deformed microstructure is fine and uniformly distributed. In summary, the surface of the material is forced to undergo a complex shear-compression deformation during the hot extrusion process, while the core belongs to a simple uniaxial extrusion deformation. In some specific deformation conditions, the difference between these two may produce some defects. © 2024 Elsevier B.V.

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