Twinning-mediated plasticity by a novel multistage twinning mode in an Mg-Al-Gd alloy

IF 8.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Letters Pub Date : 2023-10-06 DOI:10.1080/21663831.2023.2265411

Lei Zhao, Min Zha, Yipeng Gao, Kai Guan, Peng Chen, Meng-Na Zhang, Zhen-Ming Hua, Hai-Long Jia, Hui-Yuan Wang

引用次数: 0

Abstract

Twinning-mediated plasticity has great potential for enhancing the strength and plasticity of Mg alloys, which is limited due to the lack of twin types. Here, we report a novel multistage twinning mode, i.e. the dominant twinning mode changes from single {101¯2} twins to the co-existence of {101¯2} and {112¯6} twins, in a deformed Mg-Al-Gd alloy. Introducing novel multistage twinning mode to accommodate strains appreciably along c-axes, combined with the interactions of high-density dislocations and dense twin boundaries, guarantees the high strain hardening of Mg alloys. These findings provide new insights into deformation mechanisms and mechanical properties of Mg-alloys.

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一种新型多级孪晶模式在Mg-Al-Gd合金中的孪生介导塑性

孪晶介导塑性在提高镁合金强度和塑性方面具有很大的潜力，但由于孪晶类型的缺乏，这方面的潜力有限。本文报道了一种新的多阶段孪晶模式，即在变形Mg-Al-Gd合金中，优势孪晶模式由单一的{101¯2}孪晶转变为{101¯2}和{112¯6}孪晶共存。引入新的多阶段孪晶模式以适应c轴应变，结合高密度位错和致密孪晶边界的相互作用，保证了镁合金的高应变硬化。这些发现为镁合金的变形机理和力学性能提供了新的认识。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Research Letters Materials Science-General Materials Science

CiteScore

12.10

自引率

3.60%

发文量

审稿时长

3.3 months

期刊介绍： Materials Research Letters is a high impact, open access journal that focuses on the engineering and technology of materials, materials physics and chemistry, and novel and emergent materials. It supports the materials research community by publishing original and compelling research work. The journal provides fast communications on cutting-edge materials research findings, with a primary focus on advanced metallic materials and physical metallurgy. It also considers other materials such as intermetallics, ceramics, and nanocomposites. Materials Research Letters publishes papers with significant breakthroughs in materials science, including research on unprecedented mechanical and functional properties, mechanisms for processing and formation of novel microstructures (including nanostructures, heterostructures, and hierarchical structures), and the mechanisms, physics, and chemistry responsible for the observed mechanical and functional behaviors of advanced materials. The journal accepts original research articles, original letters, perspective pieces presenting provocative and visionary opinions and views, and brief overviews of critical issues.