Microstructure evolution mechanism in adiabatic shear band in TA2
来源期刊：中国有色金属学报(英文版)2004年第4期
论文作者：杨扬 熊俊 杨续跃
文章页码：670 - 674
Key words：adiabatic shear band; microstructure evolution; dynamic recrystallization
Abstract: The microstructure evolution mechanism in adiabatic shear band in commercial pure titanium (TA2) at high strain rates(γ=105-106/s) were studied. The nanosized recrystallized grains (about 50 nm in diameter) within the center of adiabatic shear band (ASB) were observed by means of transmission electronic microscope (TEM). A Rotational Dynamic Recrystallization (RDR) mechanism can explain the microstructure evolution (i.e. nanosized grains were formed within 5-10μs) in ASB. Kinetics calculations indicate that the recrystallized small grains are formed during the deformation and don t undergo significant growth by grain boundary migration after deformation.
