Effect of gadolinium on microstructure characteristics and strengthening mechanisms of Mg(-Gd)-Nd-Zn-Zr alloys by hot treatment Einfluss von Gadolinium auf die Mikrostrukturmerkmale und Verfestigungsmechanismen von Mg(-Gd)-Nd-Zn-Zr-Legierungen durch Wärmebehandlung

IF 1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialwissenschaft und Werkstofftechnik Pub Date : 2026-09-30 Epub Date: 2026-09-14 DOI:10.1002/mawe.70173

Z. H. Yan, H. Z. Xu, F. Y. Jing, Z. Y. Liu, C. Du

{"title":"Effect of gadolinium on microstructure characteristics and strengthening mechanisms of Mg(-Gd)-Nd-Zn-Zr alloys by hot treatment\n Einfluss von Gadolinium auf die Mikrostrukturmerkmale und Verfestigungsmechanismen von Mg(-Gd)-Nd-Zn-Zr-Legierungen durch Wärmebehandlung","authors":"Z. H. Yan, H. Z. Xu, F. Y. Jing, Z. Y. Liu, C. Du","doi":"10.1002/mawe.70173","DOIUrl":null,"url":null,"abstract":"<p>In this study, a quantitative analysis was performed to assess the respective contributions of gadolinium (Gd) addition and heat treatment to the strengthening of the Mg–3Nd–1Zn–0.5Zr alloy. The results indicate that gadolinium addition not only refines the grain structure but also suppresses grain growth, while simultaneously promoting precipitate formation, thereby enhancing the overall strength. Moreover, as the gadolinium concentration increases, both solid-solution strengthening and the aging response are improved, resulting in higher peak-aging hardness and an extended incubation period. Notably, the solution-treated GNZ931K alloy exhibits ultimate tensile strength (UTS), yield strength (YS), and elongation (EL) values of 227.8 MPa, 168.7 MPa, and 11.92 %, respectively. Furthermore, the peak-aged GNZ931K alloy exhibits excellent room-temperature mechanical properties, with the ultimate tensile strength, the yield strength, and the elongation values of 312.7 MPa, 219.7 MPa, and 3.34 %, respectively. Additionally, analysis of the strengthening mechanisms reveals that second-phase strengthening predominates in the as-cast state, solution strengthening becomes dominant after solution treatment, whereas precipitation strengthening plays a dominant role in the peak-aged alloy.</p>","PeriodicalId":18366,"journal":{"name":"Materialwissenschaft und Werkstofftechnik","volume":"57 9","pages":"880-894"},"PeriodicalIF":1.0000,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materialwissenschaft und Werkstofftechnik","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/mawe.70173","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/9/14 0:00:00","PubModel":"Epub","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

In this study, a quantitative analysis was performed to assess the respective contributions of gadolinium (Gd) addition and heat treatment to the strengthening of the Mg–3Nd–1Zn–0.5Zr alloy. The results indicate that gadolinium addition not only refines the grain structure but also suppresses grain growth, while simultaneously promoting precipitate formation, thereby enhancing the overall strength. Moreover, as the gadolinium concentration increases, both solid-solution strengthening and the aging response are improved, resulting in higher peak-aging hardness and an extended incubation period. Notably, the solution-treated GNZ931K alloy exhibits ultimate tensile strength (UTS), yield strength (YS), and elongation (EL) values of 227.8 MPa, 168.7 MPa, and 11.92 %, respectively. Furthermore, the peak-aged GNZ931K alloy exhibits excellent room-temperature mechanical properties, with the ultimate tensile strength, the yield strength, and the elongation values of 312.7 MPa, 219.7 MPa, and 3.34 %, respectively. Additionally, analysis of the strengthening mechanisms reveals that second-phase strengthening predominates in the as-cast state, solution strengthening becomes dominant after solution treatment, whereas precipitation strengthening plays a dominant role in the peak-aged alloy.

查看原文本刊更多论文

钆通过热处理对Mg(-Gd)-Nd-Zn-Zr合金的微观结构特性和增强机制的影响

在本研究中，定量分析了钆（Gd）添加和热处理对Mg-3Nd-1Zn-0.5Zr合金强化的各自贡献。结果表明，钆的加入不仅细化了晶粒的组织，而且抑制了晶粒的长大，同时促进了析出相的形成，从而提高了整体强度。此外，随着钆浓度的增加，固溶强化和时效响应都有所改善，导致峰值时效硬度升高，潜伏期延长。固溶处理后的GNZ931K合金的极限抗拉强度（UTS）、屈服强度（YS）和伸长率（EL）分别为227.8 MPa、168.7 MPa和11.92%。峰时效处理的GNZ931K合金具有优异的室温力学性能，极限抗拉强度为312.7 MPa，屈服强度为219.7 MPa，延伸率为3.34%。强化机制分析表明，铸态合金以第二相强化为主，固溶处理后以固溶强化为主，峰时效合金以析出强化为主。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materialwissenschaft und Werkstofftechnik 工程技术-材料科学：综合

CiteScore

2.10

自引率

9.10%

发文量

154

审稿时长

4-8 weeks

期刊介绍： Materialwissenschaft und Werkstofftechnik provides fundamental and practical information for those concerned with materials development, manufacture, and testing. Both technical and economic aspects are taken into consideration in order to facilitate choice of the material that best suits the purpose at hand. Review articles summarize new developments and offer fresh insight into the various aspects of the discipline. Recent results regarding material selection, use and testing are described in original articles, which also deal with failure treatment and investigation. Abstracts of new publications from other journals as well as lectures presented at meetings and reports about forthcoming events round off the journal.