Guinier-Preston (GP) zone strengthening of dilute magnesium alloys comprised of earth-abundant elements

IF 5.6 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Scripta Materialia Pub Date : 2025-03-15 Epub Date: 2024-12-21 DOI:10.1016/j.scriptamat.2024.116514

Jishnu J. Bhattacharyya , Seth Faberman , Zehao Li , Aaron Sullivan , Du Cheng , Bassel Khoury , Yuanchen Gao , Taisuke Sasaki , Bicheng Zhou , Derek Warner , Sean R. Agnew

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Abstract

Dilute Mg alloys based upon earth abundant Al, Zn, and Ca (along with minor additions of Mn and Zr) exhibit attractive combinations of strength, ductility, and workability via high-speed extrusion. These alloys derive their strength from high number densities of ordered, single atomic layer Guinier-Preston (GP) zones. The present study explores the potential of two quaternary Mg-Zn-Ca-Zr (ZXK210 and ZXK310) alloys produced as sheet materials. The anisotropic plastic responses of the two alloys are described using an elasto-viscoplastic self-consistent (EVPSC) polycrystal plasticity model. Similar to what was observed in AXM alloys with Mg-Ca-Al GP zones, prismatic slip is more potently strengthened than basal slip. The Mg-Zn-Ca GP zones are found to be intrinsically stronger and have a higher antiphase domain boundary energy than the Mg-Al-Ca GP zones. Finally, it is shown that the ZXK alloys are immune from natural over-aging.

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含丰富元素的稀镁合金的ginier - preston强化

稀镁合金以地球上丰富的Al、Zn和Ca（以及少量添加的Mn和Zr）为基础，通过高速挤压，呈现出强度、延展性和可加工性的迷人组合。这些合金的强度来自于高数量密度的有序单原子层Guinier-Preston （GP）区。本研究探讨了两种四元Mg-Zn-Ca-Zr （ZXK210和ZXK310）合金作为板材的潜力。采用弹粘塑性自洽（EVPSC）多晶塑性模型描述了两种合金的各向异性塑性响应。与在具有Mg-Ca-Al GP区的AXM合金中观察到的情况类似，棱柱滑移比基滑移得到了更强的强化。Mg-Zn-Ca GP区比Mg-Al-Ca GP区具有更高的反相畴边界能。结果表明，ZXK合金具有抗自然过时效的能力。

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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.