| Abstract |
| The high temperature deformation mechanisms of Ti-6A1-4V with a transformed microstructure were investigated in the context of inelastic-deformation theory. For this purpose, load-relaxation tests were conducted on samples with a lamellar structure containing different alpha-platelet thicknesses at temperatures of 715℃ - 900℃. The flow stress-versus-strain rate curves for all the microstructures were well fit with an inelastic-deformation equation describing grain-matrix deformation (dislocation glide+dislocation climb). However, for heavily pre-deformed specimens, grain-boundary sliding (CBS) as well as grain-matrix deformation was observed to occur. The GBS rate was found to be most rapid for the microstructure with the thinnest alpha laths/platelets. (Received May 31, 2004) |
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| Key Words |
| Ti-6Al-4V, Transformed microstructure, Inelastic deformation, Grain matrix deformation, Grain boundary sliding |
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