| Microstructure evolution mechanism in adiabatic shear band in TA2 |
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| 引用本文： | 杨扬,熊俊,杨续跃. Microstructure evolution mechanism in adiabatic shear band in TA2[J]. 中国有色金属学会会刊, 2004, 14(4): 670-674 |
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| 作者姓名： | 杨扬 熊俊 杨续跃 |
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| 作者单位： | [1]SchoolofMaterialsScienceandEngineering,CentralSouthUniversity,Changsha410083,China [2]DepartmentofMechanicalEngineeringandIntelligentSystems,UniversityofElectro-Communications,Japan） |
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| 基金项目： | Project(2 0 0 2 0 5 3 3 0 15 )supportedbytheDoctorateFoundationofNationalEducationMinistryofChina |
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| 摘 要： | The microstructure evolution mechanism in adiabatic shear band in commercial pure titanium (TA2) at high strain rates(γ≈l0^5 - 10^6/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.
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| 关 键 词： | 钛合金 绝热剪切带 显微结构 TEM 再结晶 |
Microstructure evolution mechanism in adiabatic shear band in TA2 |
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| YANG Yang,XIONG Jun,YANG Xu-yue. Microstructure evolution mechanism in adiabatic shear band in TA2[J]. Transactions of Nonferrous Metals Society of China, 2004, 14(4): 670-674 |
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| Authors: | YANG Yang XIONG Jun YANG Xu-yue |
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| Abstract: | The micro structure 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. |
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| Keywords: | adiabatic shear band microstructure evolution dynamic recrystallization |
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