Constitution modeling and deformation behavior of yttrium bearing TiAl alloy
来源期刊:Journal of Rare Earths2011年第2期
论文作者:陈玉勇 杨非 孔凡涛 肖树龙
文章页码:114 - 118
摘 要:The deformation flow behaviors of Ti-45Al-5.4V-3.6Nb-0.3Y alloy at different temperatures and strain rates were studied by isothermal compressing simulation test.The apparent activation energy of deformation was calculated to be 402.096 kJ/mol and constitutive equation was established to describe the flow behavior.Microstructure and flow softening observations exhibited that Ti-45Al-5.4V3.6Nb-0.3Y alloy had bad hot workability at low temperature (lower than 1 100 oC) and high strain rate (higher than 0.5 s–1) characterized by localization deformation and instability.With deformation temperature higher than 1 150 oC and strain rate lower than 0.01 s–1,the alloy owned good hot deformability,and plenty of dynamic recrystallized grains could be observed in the deformed microstructures.
陈玉勇1,杨非1,2,孔凡涛1,肖树龙1
1. School of Materials Science and Engineering,Harbin Institute of Technology2. Department of Powder Metallurgy,Guangzhou Research Institute of Non-ferrous Metals
摘 要:The deformation flow behaviors of Ti-45Al-5.4V-3.6Nb-0.3Y alloy at different temperatures and strain rates were studied by isothermal compressing simulation test.The apparent activation energy of deformation was calculated to be 402.096 kJ/mol and constitutive equation was established to describe the flow behavior.Microstructure and flow softening observations exhibited that Ti-45Al-5.4V3.6Nb-0.3Y alloy had bad hot workability at low temperature (lower than 1 100 oC) and high strain rate (higher than 0.5 s–1) characterized by localization deformation and instability.With deformation temperature higher than 1 150 oC and strain rate lower than 0.01 s–1,the alloy owned good hot deformability,and plenty of dynamic recrystallized grains could be observed in the deformed microstructures.
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