硬取向载荷下镁的非施密德张力孪晶行为与晶间取向错误高度相关

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2025-07-07 DOI:10.1016/j.scriptamat.2025.116865

Tianjiao Li , Qiyang He , Shuaishuai Liu , Wenhuan Chen , Liuyong He , Jinru Luo , Dongdi Yin , Jiang Zheng , Bin Jiang , Fusheng Pan , Manoj Gupta

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引用次数: 0

摘要

当[0002]沿ED（硬取向加载）受到张力时，具有负施密德因子的张力孪生被广泛激活。值得注意的是，84.5%的非施密德孪晶（NST）发生在取向错误角度超过30°的晶界。通过建立晶间取向错误与滑移孪晶转移应变相容性因子之间的定量关系，研究了潜在的机制。在取向角相对较大的晶界处，滑移孪晶转移能力增强是控制这种行为的关键因素。NST行为通过减轻晶界位错堆积引起的高局部应力，有利于体塑性变形。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

The high dependence of non-Schmid tension twinning behavior on intergranular misorientation in magnesium under hard-orientation loading

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The high dependence of non-Schmid tension twinning behavior on intergranular misorientation in magnesium under hard-orientation loading

Tension twinning with a negative Schmid factor was extensively activated when a [0002]⊥extrusion direction (ED) textured magnesium rod was subjected to tension along the ED (hard-orientation loading). Notably, 84.5 % of these non-Schmid twinning (NST) events occurred at grain boundaries with misorientation angles exceeding 30° The underlying mechanism was examined by establishing a quantitative relationship between intergranular misorientation and the strain compatibility factor for slip-twinning transfer. Enhanced slip-twinning transferability at grain boundaries with relatively high misorientation angles was identified as the key factor governing this behavior. The NST behavior is beneficial for bulk plastic deformation by alleviating high local stresses induced by dislocation pile-ups at grain boundaries.

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来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.