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- W2378470248 abstract "The hot deformation behavior of Ti-45Al-5Nb-0.3Y(at%) was studied on Gleeble 1500 thermo-simulation machine at different temperatures and different strain rates in order to determine the appropriate processing parameters.The results show that the true stress-strain curves present the typical dynamic recrystallization character.The flow stresses increase with the increase of strain rates and decrease of deformation temperatures.The compressed sample at the 1200℃/0.01s-1 condition is crack-free.Depending on the zener-Hollomon parameter,the calculated activation energy of deformation Q is 399.5kJmol-1.Canned forging was conducted using the parameter of 1200℃/0.05s-1 with a reduction of 70% height of ingot.The crack-free pancake was obtained.As-forged alloy has inhomogeneous microstructure comprised of major bended/broken lamella,minor dynamic recrystallization grains and remnant lamella.Dynamic recrystallization primarily occurs along the original lamellar colonies After 1150℃/80min annealing,the extensive recrystallization takes place and fine equiaxed γ grains(d=10μm) are formed,extremely minor remnant lamellae are retained.Compression tests at room temperature show that both strength and plasticity increase after forging and heat treatment.This is the result of the grain refinement and microstructural uniformity due to large deformation and subsequent heat treatment." @default.
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- W2378470248 date "2007-01-01" @default.
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- W2378470248 title "Isothermal Deformation Simulation and Canned Forging of Ti-45Al-5Nb-0.3Y Alloy" @default.
- W2378470248 hasPublicationYear "2007" @default.
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