含Zr镁合金晶粒细化机理与研究进展  

Grain Refinement Mechanism and Research Progress of Magnesium Alloy Incorporating Zr

作　　者：刘勇[1] 曾刚[1] 刘洪[1] 王煜 李建龙[1] LIU Yong;ZENG Gang;LIU Hong;WANG Yu;LI Jianlong(Key Laboratory of Lightweight and High Strength Structural Materials of Jiangxi Province,School of Advanced Manufacturing,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学先进制造学院、江西省轻质高强结构材料重点实验室,南昌330031

出　　处：《金属学报》2024年第2期129-142,共14页Acta Metallurgica Sinica

基　　金：国家重点研发计划项目No.2021YFB3501001;国家自然科学基金项目No.52061028;江西省重大研发专项项目No.20223BBE51021。

摘　　要：细晶强化是镁合金的主要强化方式。Zr是镁合金(不含Al、Si等元素)最有效的晶粒细化剂,通常以Mg-Zr中间合金的形式加入。如何调控Zr元素在Mg-Zr中间合金中的存在形态(颗粒Zr与溶质Zr)是实现含Zr镁合金晶粒有效细化的关键。本文综述了镁合金晶粒细化的理论研究,基于生长抑制理论与异质形核理论,探讨了溶质Zr与颗粒Zr细化镁合金的机理,指出了含Zr镁合金晶粒细化的工程应用瓶颈。从颗粒Zr与溶质Zr2方面综述了镁合金晶粒细化的研究进展,提出了Zr细化镁合金晶粒的协同设计策略。最后,对Zr细化镁合金晶粒的发展趋势进行了展望。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.

关 键 词：镁合金 晶粒细化 生长抑制 异质形核 Mg-Zr中间合金 

分 类 号：TG146.2[一般工业技术—材料科学与工程]