발간논문

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Vol.28, No.1, 23 ~ 32, 1990
Title
The Changes of Microstructure and Fatigue Properties by Thermomechanical processing for Ti - 6 Al - 4V Alloy
서동일D . Y . Seo, 한전건J . G . Han
Abstract
The changes of microstructure and fatigue properties by thermonechanical processing have been studied for Ti-6 Al-4 V alloy, A fine lamellar morphology was produced by solution treatment and annealing while a fine equiaxed structure was obtained by the thermonechanical processing at the tem-perature range of α+β phase. The change of morphology of a phase from fine lamellar to equiaxed one was associated with dynamical recrystallization resulting from hot rolling. The fatigue response was enhanced for the fully annealed equiaxed structure compared to that of the mixture for fine lamellar and equiaxed ones. The improvement of the fatigue propenties was attributed to the stabilization and strengthening of βphase which was the site for crack nucleation.
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