The Experts below are selected from a list of 2712 Experts worldwide ranked by ideXlab platform

Bingfeng Wang - One of the best experts on this subject based on the ideXlab platform.

  • experimental and physical model of the melting zone in the Interface of the explosive Cladding bar
    Journal of materials research and technology, 2016
    Co-Authors: Bingfeng Wang, Xiaozhou Luo, Fangyu Xie, Jindian Zhou
    Abstract:

    Abstract Local melting zone encountered in sections of the Cladding Interface is a distinguished phenomenon of the explosive Cladding technique. The thickness and morphology of the melting zone in the Ti/NiCr explosive Cladding bar are investigated by means of optical microscopy. Results show that the distribution of the melting zone in the Interface of the Ti/NiCr explosive Cladding bar is uniform and axisymmetric, and boundaries of the melting zone are circular arcs, whose center points to the center of the NiCr bar. The bamboo-shaped cracks generate in the melting zone. The thickness of the melting zone decreases with reducing of the stand-off distance and the thickness of the explosive. A physical model of the melting zone in the Interface of the explosive Cladding bar is proposed.

  • microstructure and its formation mechanism in the Interface of ti nicr explosive Cladding bar
    Journal of Materials Engineering and Performance, 2015
    Co-Authors: Bingfeng Wang, Bin Wang, Xiaozhou Luo, Shiteng Zhao, Fangyu Xie
    Abstract:

    Formation of the melting zone and the heat affected zone in the Ti/NiCr Cladding Interface determine the quality of bonding. The microstructures and mechanical properties of the melting zone and the heat affected zone in the Interface of the Ti/NiCr explosive Cladding bar are investigated by means of light microscopy, electron backscattered diffraction, and transmission electron microscopy/high-resolution transmission electron microscopy. The average bonding strength of the bar is 154.39 MPa. Intermetallics, nanograins, and amorphous phases coexist in the melting zone. The heat affected zone is characterized by low hardness, low dislocation density, bulky grains, and relatively scattered grains orientation distribution. Formation mechanisms of the melting zone and the heat affected zone are described.

  • microstructure and formation of melting zone in the Interface of ti nicr explosive Cladding bar
    Materials & Design, 2013
    Co-Authors: Bingfeng Wang, Wei Chen, Zhaolin Liu, Xiebin Zhu
    Abstract:

    Abstract The tube of titanium and the bar of NiCr alloy were bonded through explosive Cladding technique; a good quality bonding was obtained. Melting zones are encountered in sections of the explosive Cladding Interface, and they serious affect the properties of the explosive Cladding composite. Microstructure of melting zone in the Interface of Ti/NiCr explosive Cladding bar were investigated by means of optical microscope (OM), scanning electron microscope (SEM) and microhardness as well as using micro-focus X-ray diffraction and electron probe analyses. The results show that the melting zone is composed of intermetallics of brittle and stiff, and there is no element diffusion during explosive Cladding process. The tendency of composition segregation of melting zone is decreased. The solidification rate and the actual distribution coefficient of solute in the melting zone of Ti/NiCr explosive Cladding Interface are not less than 0.1 × 10 8  k/s and 1 respectively. The formation of microstructure in the melting zone is result from the high solidification rate in the explosive Cladding Interface.

  • dynamic recrystallization in adiabatic shear band in α titanium
    Materials Letters, 2006
    Co-Authors: Bingfeng Wang
    Abstract:

    The microstructure and microtexture in adiabatic shear bands (ASBs) on the titanium side of the titanium/mild steel explosive Cladding Interface are investigated by means of OM, SEM/EBSD and TEM. The highly elongated subgrains and fine equiaxed grains with low dislocation density are observed in ASBs. Recrystallization microtextures (28°, 54°, 0°), (60°, 90°, 0°) and (28°, 34°, 30°) are formed within ASBs. According to the misorientation distribution, the grain boundaries in ASBs are geometrical necessary boundaries (GNBs) with high-angles. The temperature in the ASBs is estimated to be about 776∼1142 K (0.4∼0.6 Tm). Based on the rotational dynamic recrystallization (RDR) mechanism, the fine equiaxed grains in the core of ASBs are formed during the deformation processing. These results indicate that the dynamic recrystallization take place in ASBs.

Lin Qingyun - One of the best experts on this subject based on the ideXlab platform.

  • adiabatic shear band on the titanium side in the ti mild steel explosive Cladding Interface
    Acta Materialia, 1996
    Co-Authors: Zhang Xinming, Li Zhenghua, Lin Qingyun
    Abstract:

    Abstract The microstructures of the adiabatic shear band (ASB) on the pure titanium side in the titanium/mild steel explosive Cladding Interface were investigated by means of OM, SEM and TEM. Very small equiaxed grains ( s occurred only on the titanium side and not on the mild steel side were discussed, and which was related to the differences in physical, mechanical, thermal properties and crystal structure between titanium and mild steel.

  • adiabatic shear band on the titanium side in the ti mild steel explosive Cladding Interface
    Acta Materialia, 1996
    Co-Authors: Youwen Yang, Li Zhenghua, Zhang Xinming, Lin Qingyun
    Abstract:

    The microstructures of the adiabatic shear band (ASB) on the pure titanium side in the titanium/mild steel explosive Cladding Interface were investigated by means of OM, SEM and TEM. Very small equiaxed grains (<0.1 μm) with a low dislocation density were observed in ASB. These results were discussed in terms of dynamic recrystallization, that is enabled by the adiabatic temperature rise associated with plastic deformation. This dramatic microstructural refinement enables a thermo-mechanical response that may lead to a superplastic deformation in ASB. The reasons that ASBs occurred only on the titanium side and not on the mild steel side were discussed, and which was related to the differences in physical, mechanical, thermal properties and crystal structure between titanium and mild steel.

Fangyu Xie - One of the best experts on this subject based on the ideXlab platform.

  • experimental and physical model of the melting zone in the Interface of the explosive Cladding bar
    Journal of materials research and technology, 2016
    Co-Authors: Bingfeng Wang, Xiaozhou Luo, Fangyu Xie, Jindian Zhou
    Abstract:

    Abstract Local melting zone encountered in sections of the Cladding Interface is a distinguished phenomenon of the explosive Cladding technique. The thickness and morphology of the melting zone in the Ti/NiCr explosive Cladding bar are investigated by means of optical microscopy. Results show that the distribution of the melting zone in the Interface of the Ti/NiCr explosive Cladding bar is uniform and axisymmetric, and boundaries of the melting zone are circular arcs, whose center points to the center of the NiCr bar. The bamboo-shaped cracks generate in the melting zone. The thickness of the melting zone decreases with reducing of the stand-off distance and the thickness of the explosive. A physical model of the melting zone in the Interface of the explosive Cladding bar is proposed.

  • microstructure and its formation mechanism in the Interface of ti nicr explosive Cladding bar
    Journal of Materials Engineering and Performance, 2015
    Co-Authors: Bingfeng Wang, Bin Wang, Xiaozhou Luo, Shiteng Zhao, Fangyu Xie
    Abstract:

    Formation of the melting zone and the heat affected zone in the Ti/NiCr Cladding Interface determine the quality of bonding. The microstructures and mechanical properties of the melting zone and the heat affected zone in the Interface of the Ti/NiCr explosive Cladding bar are investigated by means of light microscopy, electron backscattered diffraction, and transmission electron microscopy/high-resolution transmission electron microscopy. The average bonding strength of the bar is 154.39 MPa. Intermetallics, nanograins, and amorphous phases coexist in the melting zone. The heat affected zone is characterized by low hardness, low dislocation density, bulky grains, and relatively scattered grains orientation distribution. Formation mechanisms of the melting zone and the heat affected zone are described.

Zhang Xinming - One of the best experts on this subject based on the ideXlab platform.

  • adiabatic shear band on the titanium side in the ti mild steel explosive Cladding Interface
    Acta Materialia, 1996
    Co-Authors: Zhang Xinming, Li Zhenghua, Lin Qingyun
    Abstract:

    Abstract The microstructures of the adiabatic shear band (ASB) on the pure titanium side in the titanium/mild steel explosive Cladding Interface were investigated by means of OM, SEM and TEM. Very small equiaxed grains ( s occurred only on the titanium side and not on the mild steel side were discussed, and which was related to the differences in physical, mechanical, thermal properties and crystal structure between titanium and mild steel.

  • adiabatic shear band on the titanium side in the ti mild steel explosive Cladding Interface
    Acta Materialia, 1996
    Co-Authors: Youwen Yang, Li Zhenghua, Zhang Xinming, Lin Qingyun
    Abstract:

    The microstructures of the adiabatic shear band (ASB) on the pure titanium side in the titanium/mild steel explosive Cladding Interface were investigated by means of OM, SEM and TEM. Very small equiaxed grains (<0.1 μm) with a low dislocation density were observed in ASB. These results were discussed in terms of dynamic recrystallization, that is enabled by the adiabatic temperature rise associated with plastic deformation. This dramatic microstructural refinement enables a thermo-mechanical response that may lead to a superplastic deformation in ASB. The reasons that ASBs occurred only on the titanium side and not on the mild steel side were discussed, and which was related to the differences in physical, mechanical, thermal properties and crystal structure between titanium and mild steel.

Xiebin Zhu - One of the best experts on this subject based on the ideXlab platform.

  • microstructure and formation of melting zone in the Interface of ti nicr explosive Cladding bar
    Materials & Design, 2013
    Co-Authors: Bingfeng Wang, Wei Chen, Zhaolin Liu, Xiebin Zhu
    Abstract:

    Abstract The tube of titanium and the bar of NiCr alloy were bonded through explosive Cladding technique; a good quality bonding was obtained. Melting zones are encountered in sections of the explosive Cladding Interface, and they serious affect the properties of the explosive Cladding composite. Microstructure of melting zone in the Interface of Ti/NiCr explosive Cladding bar were investigated by means of optical microscope (OM), scanning electron microscope (SEM) and microhardness as well as using micro-focus X-ray diffraction and electron probe analyses. The results show that the melting zone is composed of intermetallics of brittle and stiff, and there is no element diffusion during explosive Cladding process. The tendency of composition segregation of melting zone is decreased. The solidification rate and the actual distribution coefficient of solute in the melting zone of Ti/NiCr explosive Cladding Interface are not less than 0.1 × 10 8  k/s and 1 respectively. The formation of microstructure in the melting zone is result from the high solidification rate in the explosive Cladding Interface.