XU Z C, XIONG F, YANG W J, et al. Research progress on rolling forming of rare earth magnesium alloys[J].Journal of Henan Polytechnic University( Natural Science), doi:10.16186/j.cnki.1673-9787.2024060023.

doi:10.16186/j.cnki.1673-9787.2024060023.

Received：2024-06-13

Revised：2024-08-07

Online：2024-09-09

Research Progress on Rolling Forming of Rare Earth Magnesium Alloys (Online)

XU Zhichao¹, XIONG Feng¹, YANG Wenju¹, YANG Wenpeng², YU Heshuai¹, YANG ZhengPeng¹

（1.Department of Material Science & Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China;2.International laboratory of High Performance Light Metal Materials and Numerical Simulation of Henan, Jiaozuo 454000, Henan, China）

Abstract：Objectives Rare earth elements have received special attention in magnesium alloying due to their unique chemical and physical properties. Rare earth magnesium alloys are well known for their high strength, but the numerous defects in their matrix pose huge challenges to subsequent processing. The rolling process has attracted widespread attention because it can effectively improve the comprehensive performance of the alloy and realize the continuous production of magnesium alloys. However, high-rare earth content magnesium alloys are prone to edge cracking during the rolling process, and their strength and plasticity are difficult to improve at the same time. To better understand the factors influencing the rolling deformation of rare earth magnesium alloys and investigate better rolling technology for rare earth magnesium alloys. Methods This paper reviews the research progress in rare earth magnesium alloy rolling in recent years and introduces the microstructure evolution and property changes of rare earth magnesium alloys under different rolling processes. Meanwhile, the advantages and disadvantages of the current rare earth magnesium alloy rolling process are discussed, and the future research direction of rare earth magnesium alloy rolling is prospected. Results In recent years, rare earth magnesium alloys have been studied using processes such as synchronous rolling, Hard-plate rolling, and Electroplastic rolling, resulting in high-strength and tough magnesium alloys that lay the foundation for the production of magnesium alloy sheets with no or few edge cracks. However, the current rare earth magnesium alloy rolling process is still dominated by synchronous rolling, and most rolling processes make it difficult to improve both strength and plasticity at the same time. Some rolling processes improve the forming performance through recrystallization but reduce the strength. Large deformation rolling results in increased strength through significant grain refinement and a high density of dislocations. However, the high density of dislocations and strong basal texture will lead to reduced plasticity. Conclusions At present, there has been a relatively systematic study on the synchronous rolling process of rare earth magnesium alloys, but further exploration of alloying and more appropriate rolling process parameters are still needed to improve the alloy properties. In addition, there are few studies on advanced rolling technology of rare earth magnesium alloys, and most studies focus on the optimization of the alloy's structure and performance, without in-depth research on its organizational evolution, strengthening mechanism and deformation mechanism. A comprehensive study of the deformation mechanism of rare earth magnesium alloys under advanced rolling technology is needed in the future.

Key words: rare earth magnesium alloy; rolling process; forming performance; texture; mechanical properties