Microstructural Morphology and Formation Mechanism of Rapidly Solidified Al-21Si Multi-Alloys

Ai Qin Wang; Jing Pei Xie; W.Y. WANG; Ji Wen Li

doi:10.4028/www.scientific.net/AMR.146-147.1597

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 146-147Microstructural Morphology and Formation Mechanism...

Microstructural Morphology and Formation Mechanism of Rapidly Solidified Al-21Si Multi-Alloys

Abstract:

In the present work, rapidly solidified Al-21Si-0.8Mg-1.5Cu-0.5Mn alloys strips was prepared by melt-spinning method. The microstructures, phase and morphology characteristics of the experimental alloy were characterized by means of scanning electron microscopy, transmission electric microscopy. The results show that the microstructures are changed obviously compared with conventional condition. The nucleation and growth of primary silicon are suppressed and primary silicon can not deposited, meanwhile, α-Al phase is nucleated which prior to eutectic. The microstructures of the rapidly solidified alloys are composed of primary micro-nanostructure α phase and feather-needles-like (α+Si) eutectic which set in the α phase. The mechanism of formation for microstructures of melt-spinning Al-Si alloy have also been discussed.

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Periodical:

Advanced Materials Research (Volumes 146-147)

Pages:

1597-1600

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.146-147.1597

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Online since:

October 2010

Authors:

Ai Qin Wang, Jing Pei Xie, W.Y. WANG, Ji Wen Li

Keywords:

Competitive Growth, Metastable State, Micro Nanocrystals, Rapid Solidification

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