Microstructure evolution and grain refining performance of new green kind of Al–5Ti–C master alloy. (April 2015)

• Record Type: Journal Article
• Authors: Ding, W. W.; Zhang, X. Y.; Zhao, W. J.; Xia, T. D.; Zhang, H. X.
• Is Part Of: International journal of cast metals research. Volume 28:Number 2(2015)
• Page Start: 89
• Page End: 96
• Publication Date: 2015-04
• Subjects: Metal castings -- Periodicals; Founding -- Periodicals; Foundry research -- Periodicals; Foundry chemistry -- Periodicals; 671.2
• DOI: 10.1179/1743133614Y.0000000138
• Languages: English
• ISSNs: 1364-0461

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>Al–5Ti–C alloy was prepared and the microstructure evolution during the remelting process and its grain refinement performance toward pure aluminium were investigated. The results show that Al–5Ti–C alloy with a more uniform microstructure was successfully prepared, and it was composed of Al, TiAl₃ and TiC. At a remelting temperature of 730°C, with the increase in heat preservation time of remelted melt, the originally dispersed TiC was aggregated and pushed toward grain boundaries by α-Al, while TiAl₃ dissoluted, aggregated and grew. At a temperature of 1000°C, with the increase in heat preservation time, not only TiC aggregated, but also the size and morphology of TiAl₃ were changed significantly as well, the TiAl₃ turning in morphology from lump-like or strip-like into coarse needle-like and flake-like grains. The grain refinement experiments show that Al–5Ti–C and remelted Al–5Ti–C master alloy have good grain refining performances.</p> </abstract>