Toward the development of Mg alloys with simultaneously improved strength and ductility by refining grain size via the deformation process

• Published in: International journal of minerals, metallurgy and materials Vol. 28; no. 1; pp. 30 - 45
• Main Authors: Zhang, Zhi, Zhang, Jing-huai, Wang, Jun, Li, Ze-hua, Xie, Jin-shu, Liu, Shu-juan, Guan, Kai, Wu, Rui-zhi
• Format: Journal Article
• Language: English
• Published: Beijing University of Science and Technology Beijing 01.01.2021; Springer Nature B.V; Key Laboratory of Superlight Material and Surface Technology,Ministry of Education,College of Material Science and Chemical Engineering,Harbin Engineer-ing University,Harbin 150001,China%Ningbo Branch,Ordnance Science Institute of China,Ningbo 315103,China%Department of Materials Physics and Chemistry,Harbin Institute of Technology,Harbin 150001,China
• Subjects: Alloys; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Corrosion and Coatings; Deformation; Deformation mechanisms; Ductility; Glass; Grain boundaries; Grain size; High strength alloys; Invited Review; Magnesium; Magnesium base alloys; Materials Science; Metallic Materials; Natural Materials; Particle size; Plastic deformation; Relativity; Surfaces and Interfaces; Thin Films; Tribology; grain refinement; high ductility; magnesium alloys; high strength; deformation process
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-020-2190-1

Magnesium (Mg) alloys, as the lightest metal engineering materials, have broad application prospects. However, the strength and ductility of traditional Mg alloys are still relativity low and difficult to improve simultaneously. Refining grain size via the deformation process based on the grain boundary strengthening and the transition of deformation mechanisms is one of the feasible strategies to prepare Mg alloys with high strength and high ductility. In this review, the effects of grain size on the strength and ductility of Mg alloys are summarized, and fine-grained Mg alloys with high strength and high ductility developed by various severe plastic deformation technologies and improved traditional deformation technologies are introduced. Although some achievements have been made, the effects of grain size on various Mg alloys are rarely discussed systematically and some key mechanisms are unclear or lack direct microscopic evidence. This review can be used as a reference for further development of high-performance fine-grained Mg alloys.