Microstructural Characterization of the Shear Bands in Fe-Cr-Ni Single Crystal by EBSD

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	Microstructural Characterization of the Shear Bands in Fe-Cr-Ni Single Crystal by EBSD
	H. J. Yang ; J. H. Zhang ; Y. B. Xu ; M. A. Meyers
刊名	Journal of Materials Science & Technology
	2008
卷号	24 期号:6 页码:819-828
关键词	High-strain rate deformation Adiabatic shear band Electron backscatter diffraction (EBSD) Recrystallization Fe-Cr-Ni single crystal severe plastic-deformation high-strain-rate adiabatic shear stainless-steel dynamic recrystallization induced martensite grain-size localization temperature evolution
ISSN号	1005-0302
中文摘要	An investigation has been made in to the microstructural characterization of the shear bands generated under high-strain rate (approximate to 10(4) s(-1)) deformation in Fe-15%Cr-15%Ni single crystal by EBSD-SEM (electron backscatter diffraction-scanning electron microscopy), TEM (transmission electron in microscopy) and HREM (highresolution electron microscopy). The results reveal that the propagation of the shear band exhibits an asymmetrical behavior arising from inhomogenous distribution in plasticity in the bands because of different resistance to the collapse in different crystallographic directions; The gamma-epsilon-alpha' phase transformations may take place inside and outside the bands, and these martensitic phases currently nucleate at intersections either between the twins and deformation bands or between the twins and epsilon-sheet. Investigation by EBSD shows that recrystallization can occur in the bands with a grain size of an average of 0.2 mu m in diameter. These nano-grains are proposed to attribute to the results of either dynamic or static recrystallization, which can be described by the rotational recrystallization mechanism. Calculation and analysis indicate that the strain rate inside the shear band can reach 2.50x10(6) s(-1), which is higher, by two or three orders of magnitude, than that exerted dynamically on the specimen tested.
原文出处	://WOS:000261773700001
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/33272]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	H. J. Yang,J. H. Zhang,Y. B. Xu,et al. Microstructural Characterization of the Shear Bands in Fe-Cr-Ni Single Crystal by EBSD[J]. Journal of Materials Science & Technology,2008,24(6):819-828.
APA	H. J. Yang,J. H. Zhang,Y. B. Xu,&M. A. Meyers.(2008).Microstructural Characterization of the Shear Bands in Fe-Cr-Ni Single Crystal by EBSD.Journal of Materials Science & Technology,24(6),819-828.
MLA	H. J. Yang,et al."Microstructural Characterization of the Shear Bands in Fe-Cr-Ni Single Crystal by EBSD".Journal of Materials Science & Technology 24.6(2008):819-828.