Overview

Grain Refinement Mechanism and Research Progress of Magnesium Alloy Incorporating Zr

  • LIU Yong ,
  • ZENG Gang ,
  • LIU Hong ,
  • WANG Yu ,
  • LI Jianlong
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  • Key Laboratory of Lightweight and High Strength Structural Materials of Jiangxi Province, School of Advanced Manufacturing, Nanchang University, Nanchang 330031, China
LIU Yong, professor, Tel: 13576087535, E-mail: liuyong@ncu.edu.cn

Received date: 2023-06-02

  Revised date: 2023-11-30

  Online published: 2023-11-23

Supported by

National Key Research and Development Program of China(2021YFB3501001);National Natural Science Foundation of China(52061028);Major Research and Development Projects of Jiangxi Province(20223BBE51021)

Abstract

Grain refinement stands out as the primary strengthening mechanism in magnesium alloys. Zr emerges as the most effective grain refiner for magnesium alloys in the absence of Al, Si, etc. Typically, Zr is introduced in the form of an Mg-Zr master alloy. The crucial factor for achieving effective grain refinement in magnesium alloys incorporating Zr lies in regulating the morphology of Zr elements in the Mg-Zr master alloy, distinguishing between particle Zr and solute Zr. This study presents the theoretical groundwork for grain refinement. Drawing upon the growth restriction theory and heterogeneous nucleation theory, the refinement mechanism of soluble Zr and particle Zr on magnesium alloys is discussed. The discussion also identifies the engineering application bottleneck associated with Zr-refined magnesium alloys. A comprehensive review of advancements in Zr-refined magnesium alloy research is conducted, encompassing particle Zr and solute Zr. This review highlights the synergistic design strategy proposed for Zr-refined magnesium alloys. Ultimately, the anticipated development trends for Zr-refined magnesium alloys is prospected.

Cite this article

LIU Yong , ZENG Gang , LIU Hong , WANG Yu , LI Jianlong . Grain Refinement Mechanism and Research Progress of Magnesium Alloy Incorporating Zr[J]. Acta Metall Sin, 2024 , 60(2) : 129 -142 . DOI: 10.11900/0412.1961.2023.00241

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