Two main and a new type rare earth elements in Mg alloys: A review

2017 3rd International Conference on Applied Materials and Manufacturing Technology

Kong, Linghang^1

Department of Mechanical Engineering, Harbin University of Science and Technology, Rongcheng Campus, China^1

关键词: Basic mechanism;    Challenge problems;    Long-period stacking ordered phase (LPSO);    Mg alloy;    Physical effects;    Solid solution strengthening;    Structure engineering;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/242/1/012026/pdf
DOI  :  10.1088/1757-899X/242/1/012026

来源: IOP

【 摘 要 】

Magnesium (Mg) alloys stand for the lightest structure engineering materials. Moreover, the strengthening of Mg alloys in ductility, toughness and corrosion predominates their wide applications. With adding rare earth elements in Mg, the mechanical properties will be improved remarkably, especially their plasticity and strength. A brief overview of the addition of rare earth elements for Mg alloys is shown. The basic mechanisms of strengthening Mg alloys with rare earth elements are reviewed, including the solid solution strengthening, grain refinement and long period stacking ordered (LPSO) phase. Furthermore, the available rare earth elements are summarized by type, chemical or physical effects and other unique properties. Finally, some challenge problems that the research is facing and future expectations of ra-re-earth Mg alloys are stated and discussed.