Engineering heterogeneous microstructures for enhanced strength and ductility in air-cooled Al−Mg−Si alloys

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-04-01 DOI:10.1016/S1003-6326(24)66731-2

Yi-han GAO , Xin-xin ZHANG , Jing-zhe ZHOU , Peng XU , Zhi-jie XIN , Jun-hua GAO , Yan-hao SHI , You LÜ , Yu-fang ZHAO , Jing-yang LI

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引用次数: 0

Abstract

The heterogeneity of α-Al(Fe,Mn)Si dispersoids and β″ precipitates was tuned to enhance the strength− ductility synergy of air-cooled Al−Mg−Si alloys. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to elucidate the microstructural parameters of these two strengthening phases. The results show that the microstructural heterogeneity can be triggered by the absence of homogenization, resulting in the presence of dispersoid-free zones (DFZs) and dispersoid zones (DZs), in conjunction with bimodal β″ precipitates. Further analytical calculations, from the strengthening model, clarify that the strategically dispersed α-Al(Fe,Mn)Si and β″ particles create “soft” and “hard” domains within the alloy, resultantly improving the mechanical properties.

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提高气冷Al - Mg - Si合金强度和延展性的工程非均相组织

调节α-Al(Fe,Mn)Si弥散体和β″相的非均质性，增强了空冷Al - Mg - Si合金的强度-塑性协同效应。采用扫描电镜（SEM）和透射电镜（TEM）分析了这两种强化相的显微组织参数。结果表明，不均质化会引发微观组织的非均质性，导致无分散区（DFZs）和分散区（DZs）的存在，并伴有双峰β″相的析出。进一步的分析计算表明，分散的α-Al(Fe,Mn)Si和β″颗粒在合金内部形成了“软”和“硬”畴，从而提高了力学性能。

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

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.