Structures of Aluminum Base Alloys Solidified by Vibrations

Abstract:

As it is known the improving of the casting alloys properties supposes both finishing and modifying their structure. Dates from castings production specify that for structure improvement the metallurgical methods are more preferred than physical ones. The study analyzes the structural changes caused by melt vibration during crystallization of hypoeutectic and eutectic silumins and of the aluminum-copper alloy. The analysis of solidification conditions was achieved by recording cooling curves, and by the qualitative and quantitative examination of the obtained structures. The monitoring of the cooling intensity with or without mechanical vibrations was performed by calculate the global thermal transfer coefficient. It was followed in the same time the influence of mechanical vibrations on the casting alloys compactity. Global thermal transfer coefficient value increased 3.5 times.

• Periodical: Advanced Materials Research (Volume 1128)
• Pages: 88-97
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1128.88
• Online since: October 2015
• Authors: Mirela Popescu, Béla Varga
• Keywords: Aluminium-Copper Alloy, Global Thermal Transfer Coefficient, Silumin, Solidification, Structure, Thermal Analysis, Vibration

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