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A quantitative strategy for achieving the high thermal conductivity of die-cast Mg-Al-based alloys
Brunel Centre for Advanced Solidification Technology (BCAST), Brunel University London, Uxbridge, United Kingdom.
Brunel Centre for Advanced Solidification Technology (BCAST), Brunel University London, Uxbridge, United Kingdom.
Brunel Centre for Advanced Solidification Technology (BCAST), Brunel University London, Uxbridge, United Kingdom.
School of Metallurgy and Materials, University of Birmingham, Birmingham, United Kingdom.
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2022 (English)In: Materialia, E-ISSN 2589-1529, article id 101426Article in journal (Refereed) Published
Abstract [en]

A quantitative strategy was reported to design and develop Mg-Al-based alloys to achieve high thermal conductivity, in which the specific RE elements can be introduced to reduce the Al concentration in Mg matrix and to suppress the formation of Mg17Al12 phase through the formation of new intermetallic phases. Based on quantitative calculations, the strategy was demonstrated by a novel die-cast Mg3.2Al4.4La0.4Nd (in wt.%) alloy, which provided the thermal conductivity of 114.3 W/(m∙K) at ambient temperature and 137.5 W/(m∙K) at 300 °C, ∼25% higher than the commercial Mg4Al4RE (AE44) alloy. Meanwhile, the alloy also offered excellent ambient yield strength of 143.2 MPa and elongation of 8.2%, and superior strength and ductility than the AE44 alloy at elevated temperatures.

Place, publisher, year, edition, pages
Elsevier, 2022. article id 101426
Keywords [en]
Magnesium alloys, Thermal conductivity, Microstructure, Mechanical property, Casting
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:his:diva-21995DOI: 10.1016/j.mtla.2022.101426ISI: 000800111300006Scopus ID: 2-s2.0-85128145350OAI: oai:DiVA.org:his-21995DiVA, id: diva2:1707959
Note

CC BY 4.0

Corresponding authors: E-mail addresses: xixi.dong@brunel.ac.uk (X. Dong), shouxun.ji@brunel.ac.uk (S. Ji).

Financial supports from Innovate UK (Project reference: 10004694) and Husqvarna Group are gratefully acknowledged. Mr. Jon Gadd from BCAST helped in the diecasting.

Available from: 2022-11-02 Created: 2022-11-02 Last updated: 2022-11-02Bibliographically approved

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Ghasemi, Rohollah

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