Improving strength-ductility synergy of as-rolled AZ31 alloy sheet by combination of dislocation-introduction and twinning treatment

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Materials Characterization Pub Date : 2025-04-01 Epub Date: 2025-02-08 DOI:10.1016/j.matchar.2025.114817

Qiyang He , Jiang Zheng , Liuyong He , Tianjiao Li , Lihong Xia , Dongdi Yin , Jiangfeng Song , Bin Jiang , Fusheng Pan

{"title":"Improving strength-ductility synergy of as-rolled AZ31 alloy sheet by combination of dislocation-introduction and twinning treatment","authors":"Qiyang He , Jiang Zheng , Liuyong He , Tianjiao Li , Lihong Xia , Dongdi Yin , Jiangfeng Song , Bin Jiang , Fusheng Pan","doi":"10.1016/j.matchar.2025.114817","DOIUrl":null,"url":null,"abstract":"<div><div>Evading the trade-off between strength and ductility has been a long-standing challenge in magnesium alloys. This study presents a novel processing route, combining dislocation introduction and twinning (CDIT) treatment, which involves 3 % tension followed by 2 % compression treatment. The influence of CDIT treatment on dislocation configurations and deformation behavior of as-rolled AZ31 alloy sheets was investigated using transmission electron microscopy (TEM) and slip trace analysis. The results indicate that CDIT treatment enhanced the strength and ductility of the AZ31 alloy simultaneously. After CDIT treatment, the yield strength increased by 42.3 % to 220.9 MPa, and elongation increased by 37.4 % to 22.4 %. CDIT treatment enhanced the activity of non-basal slip, especially within the twin. At 8 % strain, the activity of pyramidal slip in twins was significantly enhanced, with slip traces accounting for 40.0 %. The high activity of pyramidal slip likely contributes to the improved ductility. The mechanisms behind the remarkable strengthening and high activity of pyramidal slip are discussed.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"222 ","pages":"Article 114817"},"PeriodicalIF":5.5000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Characterization","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1044580325001068","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/2/8 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CHARACTERIZATION & TESTING","Score":null,"Total":0}

引用次数: 0

Abstract

Evading the trade-off between strength and ductility has been a long-standing challenge in magnesium alloys. This study presents a novel processing route, combining dislocation introduction and twinning (CDIT) treatment, which involves 3 % tension followed by 2 % compression treatment. The influence of CDIT treatment on dislocation configurations and deformation behavior of as-rolled AZ31 alloy sheets was investigated using transmission electron microscopy (TEM) and slip trace analysis. The results indicate that CDIT treatment enhanced the strength and ductility of the AZ31 alloy simultaneously. After CDIT treatment, the yield strength increased by 42.3 % to 220.9 MPa, and elongation increased by 37.4 % to 22.4 %. CDIT treatment enhanced the activity of non-basal slip, especially within the twin. At 8 % strain, the activity of pyramidal slip in twins was significantly enhanced, with slip traces accounting for 40.0 %. The high activity of pyramidal slip likely contributes to the improved ductility. The mechanisms behind the remarkable strengthening and high activity of pyramidal slip are discussed.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

采用位错引入和孪生相结合的方法提高AZ31合金轧制板的强度-塑性协同效应

如何在强度和延展性之间权衡取舍一直是镁合金面临的一个长期挑战。本研究提出了一种新的加工路线，结合位错引入和孪生（CDIT）处理，即3%的拉伸后2%的压缩处理。采用透射电镜（TEM）和滑移痕迹分析研究了CDIT处理对AZ31合金板位错形态和轧制变形行为的影响。结果表明，CDIT处理能同时提高AZ31合金的强度和塑性。经CDIT处理后，屈服强度提高42.3%至220.9 MPa，伸长率提高37.4%至22.4%。CDIT治疗增强了非基底滑动的活性，尤其是在双胞胎中。在8%应变下，孪生体锥体滑移活性显著增强，滑移迹占40.0%。锥体滑移的高活性可能有助于提高延性。讨论了锥体滑移显著强化和高活性的机理。

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分钟内获得全文去求助

来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.