Abstract
The strength and ductility of two-phase TiAl alloys are very dependent on microstructural size and morphologies and much research is being devoted to obtaining optimal properties. Recent research carried out on alloys produced by consolidation of powders of composition Ti-48Al-2Mn-2Nb-0.06C confirmed that very fine grain sizes are obtained by HIPping the atomized powders. This is due to the recrystallization of the initial cellular structures and the presence of the {alpha}{sub 2} phase at the boundaries between {gamma} grains that helps pinning them and slow down their growth. Such fine microstructures appear interesting to study the kinetics of grain growth as a larger number of grains can be measured thus providing good statistics for a proper analysis of the mechanisms involved in the process. The present study presents such analysis aiming at a better understanding of structure coarsening in {gamma}-based TiAl alloys.
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