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Effect of C/Ti Ratio and Al Powder Size on Microstructure and Performance of Al-Ti-C Grain Refiner

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Abstract:

Al-Ti-C grain refiners have been prepared by combining self-propagating high-temperature synthesis (SHS) technique and melting-casting method. Effects of Al powder size and C/Ti ratio on the microstructures and grain-refining efficiency of Al-Ti-C grain refiners were studied by OM, XRD, SEM and EDS. The results show that when Al powder size is fine, and C/Ti ratio is 1: 8, SHS reaction among the mixed powders can easily carry on in the melt. As a result, the prepared grain refiner consists of blocky Al3Ti and fine TiC particles distributed in Al matrix, and exhibits excellent grain refining performance on commercially pure Al.

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Periodical:

Key Engineering Materials (Volumes 353-358)

Pages:

2981-2984

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.353-358.2981

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Online since:

September 2007

Authors:

Chun Xiang Xu, Li Ping Liang, Bin Feng Lu, Jin Shan Zhang, Wei Liang

Keywords:

Al-Ti-C Grain Refiner, C/Ti Ratio, Microstructure, SHS Technique

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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