Expansion Behavior and Microstructures of Hypereutectic Al-Si Alloys Subjected to Thermal Cycling

Xue Wei Zhu; Ri Chu Wang; Jian Peng

doi:10.4028/www.scientific.net/AMR.937.145

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 937Expansion Behavior and Microstructures of...

Expansion Behavior and Microstructures of Hypereutectic Al-Si Alloys Subjected to Thermal Cycling

Abstract:

The effects of the thermal cycling on the coefficient of thermal expansion (CTE) and microstructure of the hypereutectic Al-Si alloys were investigated. The hypereutectic Al-Si alloy was produced by spray-forming and extruding process. Experiment results showed that the distribution of Si in Al matrix is uniform for the Al-Si alloy. The primary Si phase grew gradually during the thermal cycle. There is no remarkable change of CTE during thermal cycling for both materials at the same temperature range. The CTE of Al-Si alloy decrease with increasing on thermal cycling temperature up to 300°C due to the compressive thermal stress in the alloys.

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Periodical:

Advanced Materials Research (Volume 937)

Pages:

145-149

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.937.145

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Online since:

May 2014

Authors:

Xue Wei Zhu*, Ri Chu Wang, Jian Peng

Keywords:

Coefficient of Thermal Expansion (CTE), Hypereutectic Al-Si Alloy, Microstructure, Thermal Cycling

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