Grain Refining Performance of SHS Al—50TiC Master Alloys for Commercially pure Aluminum

An Al-50wt^TiC composite was directly synthesized by self-propagating high-temperature synthesis(SHS) technology,and then was used as a grain refining master alloy for commercially pure aluminun.The microstructure and grain refining performance of the synthesized master alloy were emphatically inves...

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Bibliographic Details
Published in:Journal of Wuhan University of Technology. Materials science edition 2002-09, Vol.17 (3), p.13-16
Main Authors: Yan, You-Wei, Fu, Zheng-Yi, Yuan, Run-Zhang
Format: Article
Language:English
Subjects:
Alloys
Aluminum
Aluminum base alloys
Al－TiC
Columnar structure
Grain refinement
Grain size
Master alloys
Metallurgy
Self propagating high temperature synthesis
SHS
Titanium carbide
显微组织
碳化钛
铝合金
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Summary:An Al-50wt^TiC composite was directly synthesized by self-propagating high-temperature synthesis(SHS) technology,and then was used as a grain refining master alloy for commercially pure aluminun.The microstructure and grain refining performance of the synthesized master alloy were emphatically investigated.The SHS master alloy only ocntained submicron TiC particles except for Al matrix.Moreover,TiC particles were relatively free of agglomeration.Grain refining tests show that adding only 0.1wt^ of the master alloys to the aluminum melt could transform the sturcture of the solidified samples from coarse columnar grains to fine almost 1.5h at 1003K.Therefore,it is concluded that the SHS master alloy is an effective grain refiner for aluminum and its alloys,and that it is highly resistant to the grain refining fading encountered with most grain refiners.
ISSN:1000-2413
1993-0437
DOI:10.1007/bf02838530