Twinning behavior of an extruded Mg-Gd-Y-Zn-Zr alloy sheet under tension and compression

IF 5.2 1区化学 Q1 CHEMISTRY, APPLIED

Journal of Rare Earths Pub Date : 2024-09-05 DOI:10.1016/j.jre.2024.08.020

Jianfen Huang , Tao Chen , Wugui Jiang , Longhui Mao , Zhiyong Chen

引用次数: 0

Abstract

In this study, twinning behaviors of an extruded Mg-4.7Gd-3.4Y-1.2Zn-0.5Zr (wt%) alloy sheet along different directions extrusion direction (ED), 45°: 45° to ED and transverse direction (TD) under tension and compression were investigated. The results show that: (i) the twinning frequency of the extruded alloy sheet along different directions shows obvious anisotropy under both tension and compression while demonstrating opposite orders of ED > 45° > TD under tension and TD > 45° > ED under compression. Such anisotropic twinning frequencies are both in accord with their average twinning Schmid factor (TSF) orders. (ii) Under both tension and compression, the twinning variants (TVs) with the highest and the second highest TSF are frequently selected with priority. However, the TV selection law under tension has a certain difference from that of compression, which should be related to the TSF distributions of ortho-TV, meta-TV and para-TV under tension and compression.

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挤压成型的 Mg-Gd-Y-Zn-Zr 合金板材在拉伸和压缩条件下的孪晶行为

在这项研究中，研究了挤压成型的镁-4.7钆-3.4铍-1.2锌-0.5锆（重量比）合金板材在拉伸和压缩过程中沿挤压方向（ED）、与ED成45°方向和横向方向（TD）的孪生行为：45°和横向（TD）进行了拉伸和压缩试验。结果表明(i) 在拉伸和压缩条件下，沿不同方向挤压的合金板材的孪晶频率呈现出明显的各向异性，同时在拉伸条件下呈现出 ED > 45° > TD 的相反顺序，在压缩条件下呈现出 TD > 45° > ED 的相反顺序。这种各向异性的孪晶频率与其平均孪晶施密特因子（TSF）阶数一致。(ii) 在拉伸和压缩条件下，TSF 最高和次高的孪晶变体（TV）经常被优先选择。但是，拉伸条件下的孪生变体选择规律与压缩条件下的孪生变体选择规律存在一定差异，这应该与拉伸和压缩条件下的正孪生变体、元孪生变体和副孪生变体的 TSF 分布有关。

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

Journal of Rare Earths 化学-应用化学

CiteScore

8.70

自引率

14.30%

发文量

374

审稿时长

1.7 months

期刊介绍： The Journal of Rare Earths reports studies on the 17 rare earth elements. It is a unique English-language learned journal that publishes works on various aspects of basic theory and applied science in the field of rare earths (RE). The journal accepts original high-quality original research papers and review articles with inventive content, and complete experimental data. It represents high academic standards and new progress in the RE field. Due to the advantage of abundant RE resources of China, the research on RE develops very actively, and papers on the latest progress in this field emerge every year. It is not only an important resource in which technicians publish and obtain their latest research results on RE, but also an important way of reflecting the updated progress in RE research field. The Journal of Rare Earths covers all research and application of RE rare earths including spectroscopy, luminescence and phosphors, rare earth catalysis, magnetism and magnetic materials, advanced rare earth materials, RE chemistry & hydrometallurgy, RE metallography & pyrometallurgy, RE new materials, RE solid state physics & solid state chemistry, rare earth applications, RE analysis & test, RE geology & ore dressing, etc.