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HomeMaterials Science ForumMaterials Science Forum Vol. 816Effect of Sr and La on the In Situ A356-TiB2...

Effect of Sr and La on the In Situ A356-TiB₂ Composite Fabricated via Remelting and Diluting Approach

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Abstract:

In this paper, a remelting and diluting (RD) approach was used to fabricate in situ A356-3wt.%TiB₂ composites and the effect of Sr and La on the modification of the composites is investigated in comparison with the conventional flux assisted synthesis (FAS) approach. The microstructure was examined and tensile properties were tested to evaluate the modification efficiency on the composites. The results demonstrated that composites fabricated via RD approach achieve preferable modification by Sr and La due to the higher level of melt cleanliness so as to minimize the Sr-B interaction, in which the eutectic Si which displays a microstructure with globular-fibrous eutectic Si particles. Superior mechanical properties are obtained in the RD composites (especially the elongation) after modified by Sr and La.

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Periodical:

Materials Science Forum (Volume 816)

Pages:

21-26

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.816.21

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Online since:

April 2015

Authors:

Yuan Ping Zheng, Ming Yu Li, Yu Fe Zhao, Zong Ning Chen, Tong Min Wang, Hui Jun Kang

Keywords:

A356-3wt.%TiB₂ Composites, In Situ composites, La Modification, Microstructure, Sr Modification, Tensile Properties

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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