Hot tearing and mechanical properties of high electrical and thermal conductivity Al-Fe-Mg-Si-Ni Alloys

IF 1.3 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

International Journal of Cast Metals Research Pub Date : 2022-11-02 DOI:10.1080/13640461.2023.2173855

S. Kotiadis, A. Zimmer, A. Elsayed

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引用次数: 0

Abstract

ABSTRACT Aluminium alloys with Fe and Ni show potential as high castability alloys with high strength and high electrical/thermal conductivities for electric vehicle powertrains. Permanent mould castings of Al-Fe-Ni alloys with additions of Mg and Si were prepared to assess hot tearing susceptibility and mechanical properties. The electrical conductivity of the Al-Fe-Ni alloys was measured, and the Wiedemann-Franz law was used to estimate the thermal conductivity. The results show that a hot tear resistant Al-Fe-Ni alloy with composition Al-1.2Fe-0.5Mg-0.3Si-0.2Ni had an electrical conductivity of 50.91 ±0.29%IACS with yield strength, ultimate tensile strength, and elongation of 60.5 MPa, 141 MPa and 7.9%, respectively. The microstructure of the Al-Fe-Ni alloys contained primary Al, Al9FeNi and Mg2Si. The short freezing ranges and fine intermetallics allowed for good castability. The prepared Al-Fe-Ni alloys are potential new castable Al alloys that have thermal and electrical conductivity nearing wrought (6061 and 6101) compositions.

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高导电性和导热性Al-Fe-Mg-Si-Ni合金的热撕裂和力学性能

摘要：含铁和镍的铝合金在电动汽车动力系统中表现出作为高强度、高导电性/导热性的高浇注性合金的潜力。制备了添加Mg和Si的Al-Fe-Ni合金永久模铸件，以评估其热裂敏感性和力学性能。测量了Al-Fe-Ni合金的电导率，并使用Wiedemann-Franz定律来估计热导率。结果表明，组成为Al-1.2Fe-0.5Mg-0.3Si-0.2Ni的耐热撕裂Al-Fe-Ni合金的电导率为50.91±0.29%IACS，屈服强度、极限拉伸强度和伸长率分别为60.5MPa、141MPa和7.9%。Al-Fe-Ni合金的显微组织含有初生Al、Al9FeNi和Mg2Si。较短的凝固范围和细小的金属间化合物使其具有良好的可铸性。所制备的Al-Fe-Ni合金是具有接近锻造（6061和6101）成分的热导率和电导率的潜在的新型可浇注Al合金。

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来源期刊

International Journal of Cast Metals Research 工程技术-冶金工程

CiteScore

2.70

自引率

7.10%

发文量

审稿时长

7.5 months

期刊介绍： The International Journal of Cast Metals Research is devoted to the dissemination of peer reviewed information on the science and engineering of cast metals, solidification and casting processes. Assured production of high integrity castings requires an integrated approach that optimises casting, mould and gating design; mould materials and binders; alloy composition and microstructure; metal melting, modification and handling; dimensional control; and finishing and post-treatment of the casting. The Journal reports advances in both the fundamental science and materials and production engineering contributing to the successful manufacture of fit for purpose castings.