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

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Scripta Materialia Pub 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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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.