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Adiabatic shear bands on the titanium side in the titanium/mild steel explosive cladding interface: Experiments, numerical simulation, and microstructure evolution

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Abstract

The microstructure and microtexture in adiabatic shear bands (ASBs) on the titanium side in the titanium/mild steel explosive cladding interface are investigated by means of optical microscopy, scanning electron microscopy/electron backscattered diffraction (SEM/EBSD), and transmission electron microscopy (TEM). Highly elongated subgrains and fine equiaxed grains with low dislocation density are observed in the ASBs. Microtextures (25 deg, 75 deg, 0 deg), (70 deg, 45 deg, 0 deg), and (0 deg, 15 deg, 30 deg) formed within the ASBs suggest the occurrence of the recrystallization. The grain boundaries within ASBs are geometrically necessary boundaries (GNBs) with high angles. Finite element computations are performed to obtain the effective strain and temperature distributions within the ASBs under the measured boundary conditions. The rotation dynamic recrystallization (RDR) mechanism is employed to describe the kinetics of the nanograins’ formation and the recrystallized process within ASBs. During the deformation time (about 5 to 10 µs), the following processes take place: dislocations accumulate to form elongated cell structures, cell structures break up to form subgrains, and subgrains rotate and finally form recrystallized grains. 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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Authors and Affiliations

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

    Y. Yang, B. F. Wang, J. Xiong, Y. Zeng & Z. P. Chen

  2. the Department of Mechanical Engineering and Intelligent Systems, The University of Electro-Communications, Chofugaoka, Chofu-shi, 182, Tokyo, Japan

    X. Y. Yang

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  1. Y. Yang
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  2. B. F. Wang
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  3. J. Xiong
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  4. Y. Zeng
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  5. Z. P. Chen
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Yang, Y., Wang, B.F., Xiong, J. et al. Adiabatic shear bands on the titanium side in the titanium/mild steel explosive cladding interface: Experiments, numerical simulation, and microstructure evolution. Metall Mater Trans A 37, 3131–3137 (2006). https://doi.org/10.1007/s11661-006-0193-9

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  • DOI: https://doi.org/10.1007/s11661-006-0193-9

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