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Effect of Heat Treatment and Composition on Grain Size and Lamellar Spacing of a Lamellar TiAl Alloy

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Abstract:

The article presents the results of optical microscopy, scanning electron microscopy (SEM), Transmission Electron Microscope (TEM) conducted on a Ti–46.5Al–2.5V-1.0Cr–0.3Ni alloy before and after different heat treatments. Heat treatment of the alloy at 1340°C followed by cooling leads to the formation of the fully lamellar microstructure which consists of γ lamellae mostly and of small amount of α2 lamellae. The cooling rate of 50°C/min in alloy tcx1-G produced an optimal microstructure. This cooling rate generated finest lamellae with the smallest individual lamella spacing among the alloys.

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Periodical:

Advanced Materials Research (Volumes 335-336)

Pages:

774-778

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.335-336.774

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Online since:

September 2011

Authors:

Xia Chang, Xiao Bin Zhang, Ji Zhang

Keywords:

GD Addition, Heat Treatment, Lamellar Spacing, Titanium Aluminide

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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