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Microstructure evolution in adiabatic shear band in α-titanium

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Abstract

The microstructure and microtexture of adiabatic shear bands (ASBs) on the titanium side of a titanium/mild steel explosive cladding interface are investigated by means of optical microscopy (OM), scanning electron microscopy/electron back-scattered diffraction (SEM/EBSD) and transmission electron microscopy (TEM). Highly elongated subgrains and fine equiaxed grains with low dislocation density are observed in the ASBs. Recrystallization microtextures (28°, 54°, 0°), (60°, 90°, 0°) and (28°, 34°, 30°) are formed within ASBs. The grain boundaries within ASBs are geometrical necessary boundaries (GNBs) with high-angles. Based on the relations between temperature and the engineering shear strain, the temperature in the ASBs is estimated to be about 776–1142 K (0.4–0.6 T m). The rotation dynamic recrystallization (RDR) mechanism is employed to describe the kinetics of the nano-grains’ formation and the recrystallized process within ASBs. The small grains within ASBs are formed during the deformation and do not undergo significant growth by grain boundary migration after deformation.

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Acknowledgements

This work is supported by the Ph. D. Programs Foundation of Ministry of Education of China, No. 20020533015 and by National Nature Science Foundation of China, No. 50471059.

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  1. School of Materials Science and Engineering, Central South University, Changsha, 410083, Hunan, People’s Republic of China

    Y. Yang & B. F. Wang

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  1. Y. Yang
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  2. B. F. Wang
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Correspondence to Y. Yang.

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Yang, Y., Wang, B.F. Microstructure evolution in adiabatic shear band in α-titanium. J Mater Sci 41, 7387–7392 (2006). https://doi.org/10.1007/s10853-006-0811-3

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  • DOI: https://doi.org/10.1007/s10853-006-0811-3

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