Effect of Zn and Al alloying on slip system activation and strengthening mechanisms in magnesium alloys

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

Scripta Materialia Pub Date : 2025-07-05 DOI:10.1016/j.scriptamat.2025.116862

Gaoming Zhu , Young Min Kim , Ulrich Lienert , Dietmar Letzig , Sangbong Yi

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Abstract

The deformation mechanisms of Zn- and Al-alloyed Mg were investigated using in-situ three-dimensional synchrotron X-ray diffraction (3DXRD). The activation of basal and prismatic slip was quantified in Mg-1Al (A1), Mg-1 Zn (Z1), and Mg-1Al-1 Zn (ZA11) alloys in order to assess the influence of solute alloying on slip system competition. The results reveal that the combined addition of Zn and Al facilitates prismatic slip activation by reducing its critical resolved shear stress (CRSS), and leads to the lowest RSS_prism/RSS_basal ratio of 5.44, compared to 6.25 in A1 and 6.23 in Z1. This indicates a more balanced activation of basal and non-basal slip systems. Grain rotation analysis further suggests that ZA11 accommodates deformation more effectively through non-basal slip, reducing stress localization. These findings provide direct insights into how solute interactions influence slip system activity and offer guidelines for optimizing Mg alloys for improved ductility and mechanical performance.

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Zn和Al合金化对镁合金滑移体系激活及强化机制的影响

采用原位三维同步x射线衍射（3DXRD）研究了Zn-和al -合金Mg的变形机理。定量分析了Mg-1Al （A1）、mg - 1zn （Z1）和Mg-1Al- 1zn （ZA11）合金中基底滑移和棱柱滑移的激活，以评估溶质合金化对滑移系统竞争的影响。结果表明，Zn和Al的联合添加通过降低临界分解剪切应力（CRSS）促进了棱柱滑移的激活，并导致了最低的RSSprism/ rssbase比值为5.44，而A1为6.25，Z1为6.23。这表明基底和非基底滑动系统的激活更为平衡。晶粒旋转分析进一步表明，ZA11通过非基面滑移更有效地调节变形，减少应力局部化。这些发现提供了溶质相互作用如何影响滑移系统活性的直接见解，并为优化镁合金提供了指导方针，以提高延展性和机械性能。

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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.