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

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Materials Characterization Pub 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

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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.

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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.