Achieving simultaneous improvement in strength and ductility in Al–Si–Mg–Ce alloy through synergistic morphology modification of eutectic (Si) and Al2Si2Ce phases by Sr addition

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t Pub Date : 2024-09-16 DOI:10.1016/j.jmrt.2024.09.108

Lingyang Zeng , Yancheng Jin , Jianbao Gao , Wang Yi , Li Chen , Lijun Zhang

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引用次数: 0

Abstract

In this paper, it was found for the first time that with Sr addition in Al–Si–Mg–Ce alloy, the morphology of eutectic (Si) can be modified from branch to fine fibrous, while the bulk-like Al₂Si₂Ce phase may replace the elongated needle-like one. Moreover, Mg was observed to segregate along the (Al)/Al₂Si₂Ce interface and Sr was found to concentrate in the interior of Al₂Si₂Ce phase. Such heterostructured Sr–Al₂Si₂Ce was also supported by first-principles calculations. The synergistic morphology modification of eutectic (Si) and Al₂Si₂Ce phases by Sr addition stimulated the simultaneous improvement in strength and ductility in Al–Si–Mg–Ce alloy.

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通过添加锶对共晶（Si）和 Al2Si2Ce 相进行协同形态改性，同时提高 Al-Si-Mg-Ce 合金的强度和延展性

本文首次发现，在 Al-Si-Mg-Ce 合金中添加 Sr 后，共晶（Si）的形态可从枝状变为细纤维状，而块状的 Al2Si2Ce 相可取代细长的针状相。此外，还观察到镁沿着（Al）/Al2Si2Ce 界面偏析，而锶则集中在 Al2Si2Ce 相的内部。这种异质结构的 Sr-Al2Si2Ce 也得到了第一原理计算的支持。通过添加 Sr 对共晶（Si）相和 Al2Si2Ce 相进行协同形态修饰，可同时提高 Al-Si-Mg-Ce 合金的强度和延展性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Materials Research and Technology-Jmr&t Materials Science-Metals and Alloys

CiteScore

8.80

自引率

9.40%

发文量

1877

审稿时长

35 days

期刊介绍： The Journal of Materials Research and Technology is a publication of ABM - Brazilian Metallurgical, Materials and Mining Association - and publishes four issues per year also with a free version online (www.jmrt.com.br). The journal provides an international medium for the publication of theoretical and experimental studies related to Metallurgy, Materials and Minerals research and technology. Appropriate submissions to the Journal of Materials Research and Technology should include scientific and/or engineering factors which affect processes and products in the Metallurgy, Materials and Mining areas.