The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Wenwu Cao - One of the best experts on this subject based on the ideXlab platform.
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Complete set of material constants of single domain (K, Na)(Nb, Ta)O3 single crystal and their Orientation Dependence
Applied physics letters, 2014Co-Authors: Limei Zheng, Shijing Sang, Junjun Wang, Xiaoqing Huo, Rui Wang, Zhongyuan Yuan, Wenwu CaoAbstract:A self-consistent complete set of dielectric, piezoelectric, and elastic constants for single domain Ta modified (K, Na)NbO3 (KNN) crystal was determined. This full set constant for single domain KNN-based crystals allowed the prediction of Orientation Dependence of the longitudinal dielectric, piezoelectric, elastic coefficients, and electromechanical coupling factors. The maximum piezoelectric and electromechanical properties were found to exist near [001]C. In addition, material constants of [001]C poled domain engineered single crystal with 4 mm symmetry were experimentally measured and compared with the calculated values. Based on this, extrinsic contribution to the piezoelectricity was estimated to be ∼20%.
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Orientation Dependence of piezoelectric properties and mechanical quality factors of 0 27pb in1 2nb1 2 o3 0 46pb mg1 3nb2 3 o3 0 27pbtio3 mn single crystals
Journal of Applied Physics, 2013Co-Authors: Raffi Sahul, Limei Zheng, Shujun Zhang, Wenhua Jiang, Wenwu CaoAbstract:The complete set of material constants of single domain rhombohedral phase 0.27Pb(In1/2Nb1/2)O3-0.46Pb(Mg1/3Nb2/3)O3-0.27PbTiO3:Mn single crystal has been determined. The Orientation Dependence of piezoelectric, dielectric, and electromechanical properties was calculated based on these single domain data. The maximum piezoelectric and electromechanical properties were found to exist near the [001]C pseudo-cubic direction. In addition, the piezoelectric properties of [001]C poled crystals with “4R” multi-domain configuration were experimentally measured and compared with the calculated values. Only a small difference (3%) was found between experimental and theoretical values, indicating the high piezoelectric properties in the “4R” state are mainly from intrinsic contributions. The mechanical quality factors Q33 are significantly improved by the Mn-doping for the “4R” domain engineered crystals but almost no change for the single domain “1R” state. On the other hand, Q15 of both single domain and multidoma...
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Orientation Dependence of piezoelectric properties of single domain 0 67pb mn1 3nb2 3 o3 0 33pbtio3 crystals
Applied Physics Letters, 2003Co-Authors: Rui Zhang, Bei Jiang, Wenwu CaoAbstract:The Orientation Dependence of piezoelectric properties has been calculated for 0.67Pb(Mn1/3Nb2/3)O3–0.33PbTiO3 (PMN–33%PT) single-domain crystals based on the measured full matrix properties. It is found that the maximum d33*=2411 pC/N and k33*=0.94 occur, respectively, in directions 63.0° and 70.8° from the spontaneous polarization direction. In [001] of the cubic coordinate, the rotated properties are d33*=2316 pC/N and k33*=0.93, respectively, comparable to the measured multidomain properties. The results revealed the origin of the superior electromechanical properties in [001] poled PMN–33%PT multidomain crystals as from the large d15 of the single-domain property.
Rintaro Ueji - One of the best experts on this subject based on the ideXlab platform.
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crystallographic Orientation Dependence of deformation induced martensitic transformation of 1 3 gpa class 0 6 c bainitic steel with retained austenite
Scripta Materialia, 2021Co-Authors: Rintaro Ueji, Akinobu Shibata, Kohsaku Ushioda, Yuuji Kimura, Takahito Ohmura, Tadanobu InoueAbstract:Abstract The crystallographic Orientation Dependence of the stability of retained austenite against deformation-induced martensitic transformation in 0.6 %C alloyed steel was studied. A bainite structure with about 40 % volume fraction of retained austenite was successfully obtained by austempering. Tensile testing at room temperature revealed a high strength of 1.3 GPa with adequate elongation. A change in texture of retained austenite brought about by tensile deformation to several strains was measured. Deformation-induced martensitic transformation occurred preferentially in grains with the tensile axis nearly parallel to fcc. The Orientation Dependence of the martensitic transformation was compatible with that of the {1-11}fcc fcc shear deformation which can be regarded as the first primitive process for the martensitic transformation as proposed by Bogers and Burgers. This compatibility is discussed in terms of the elastically normalized Schmid factor for the transformation dislocation to act for the lattice change.
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crystallographic Orientation Dependence of deformation induced martensitic transformation of 1 3 gpa class 0 6 c bainitic steel with retained austenite
Social Science Research Network, 2020Co-Authors: Rintaro Ueji, Akinobu Shibata, Kohsaku Ushioda, Yuuji Kimura, Takahito Ohmura, Tadanobu InoueAbstract:The crystallographic Orientation Dependence of the stability of retained austenite against deformation-induced martensitic transformation in 0.6%C alloyed steel was studied. A bainite structure with about 40% volume fraction of retained austenite was successfully obtained by austempering. Tensile testing at room temperature revealed a high strength of 1.3 GPa with adequate elongation. A change in texture of retained austenite brought about by tensile deformation to several strains was measured. Deformation-induced martensitic transformation occurred in grains with the tensile axis nearly parallel to fcc was significantly stabilized. The Orientation Dependence of the martensitic transformation was compatible with that of the {1-11}fcc fcc shear deformation which can be regarded as the first primitive process for the martensitic transformation as proposed by Bogers and Burgers. This compatibility is discussed in terms of the elastically normalized Schmid factor for the transformation dislocation to act for the lattice change.
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crystallographic Orientation Dependence of e martensite transformation during tensile deformation of polycrystalline 30 mn austenitic steel
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2013Co-Authors: Rintaro Ueji, Yoshinori Takagi, Noriyuki Tsuchida, Kazunari Shinagawa, Yasuhiro Tanaka, Takashi MizuguchiAbstract:Abstract The Dependence of the e martensite transformation on the crystallographic Orientation during a tensile test of metastable high-manganese austenitic steel, Fe–30 mass% Mn, with a polycrystalline microstructure was studied. The e martensite plates were formed after the steel yielded by slipping, and the volume fraction of the e martensite increased with increasing strain. No significant Orientation Dependence of the martensite formation was observed in the early stage of the tensile deformation, but when the sample was further strained up to about 30%, the tensile directions of the grains with martensite were preferentially found to be nearly parallel to the 〈111〉 direction of the austenite matrix. This Orientation Dependence corresponded with the Orientation preferable for the development of local misOrientations as detected by EBSD.
Tadanobu Inoue - One of the best experts on this subject based on the ideXlab platform.
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crystallographic Orientation Dependence of deformation induced martensitic transformation of 1 3 gpa class 0 6 c bainitic steel with retained austenite
Scripta Materialia, 2021Co-Authors: Rintaro Ueji, Akinobu Shibata, Kohsaku Ushioda, Yuuji Kimura, Takahito Ohmura, Tadanobu InoueAbstract:Abstract The crystallographic Orientation Dependence of the stability of retained austenite against deformation-induced martensitic transformation in 0.6 %C alloyed steel was studied. A bainite structure with about 40 % volume fraction of retained austenite was successfully obtained by austempering. Tensile testing at room temperature revealed a high strength of 1.3 GPa with adequate elongation. A change in texture of retained austenite brought about by tensile deformation to several strains was measured. Deformation-induced martensitic transformation occurred preferentially in grains with the tensile axis nearly parallel to fcc. The Orientation Dependence of the martensitic transformation was compatible with that of the {1-11}fcc fcc shear deformation which can be regarded as the first primitive process for the martensitic transformation as proposed by Bogers and Burgers. This compatibility is discussed in terms of the elastically normalized Schmid factor for the transformation dislocation to act for the lattice change.
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crystallographic Orientation Dependence of deformation induced martensitic transformation of 1 3 gpa class 0 6 c bainitic steel with retained austenite
Social Science Research Network, 2020Co-Authors: Rintaro Ueji, Akinobu Shibata, Kohsaku Ushioda, Yuuji Kimura, Takahito Ohmura, Tadanobu InoueAbstract:The crystallographic Orientation Dependence of the stability of retained austenite against deformation-induced martensitic transformation in 0.6%C alloyed steel was studied. A bainite structure with about 40% volume fraction of retained austenite was successfully obtained by austempering. Tensile testing at room temperature revealed a high strength of 1.3 GPa with adequate elongation. A change in texture of retained austenite brought about by tensile deformation to several strains was measured. Deformation-induced martensitic transformation occurred in grains with the tensile axis nearly parallel to fcc was significantly stabilized. The Orientation Dependence of the martensitic transformation was compatible with that of the {1-11}fcc fcc shear deformation which can be regarded as the first primitive process for the martensitic transformation as proposed by Bogers and Burgers. This compatibility is discussed in terms of the elastically normalized Schmid factor for the transformation dislocation to act for the lattice change.
Akinobu Shibata - One of the best experts on this subject based on the ideXlab platform.
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crystallographic Orientation Dependence of deformation induced martensitic transformation of 1 3 gpa class 0 6 c bainitic steel with retained austenite
Scripta Materialia, 2021Co-Authors: Rintaro Ueji, Akinobu Shibata, Kohsaku Ushioda, Yuuji Kimura, Takahito Ohmura, Tadanobu InoueAbstract:Abstract The crystallographic Orientation Dependence of the stability of retained austenite against deformation-induced martensitic transformation in 0.6 %C alloyed steel was studied. A bainite structure with about 40 % volume fraction of retained austenite was successfully obtained by austempering. Tensile testing at room temperature revealed a high strength of 1.3 GPa with adequate elongation. A change in texture of retained austenite brought about by tensile deformation to several strains was measured. Deformation-induced martensitic transformation occurred preferentially in grains with the tensile axis nearly parallel to fcc. The Orientation Dependence of the martensitic transformation was compatible with that of the {1-11}fcc fcc shear deformation which can be regarded as the first primitive process for the martensitic transformation as proposed by Bogers and Burgers. This compatibility is discussed in terms of the elastically normalized Schmid factor for the transformation dislocation to act for the lattice change.
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crystallographic Orientation Dependence of deformation induced martensitic transformation of 1 3 gpa class 0 6 c bainitic steel with retained austenite
Social Science Research Network, 2020Co-Authors: Rintaro Ueji, Akinobu Shibata, Kohsaku Ushioda, Yuuji Kimura, Takahito Ohmura, Tadanobu InoueAbstract:The crystallographic Orientation Dependence of the stability of retained austenite against deformation-induced martensitic transformation in 0.6%C alloyed steel was studied. A bainite structure with about 40% volume fraction of retained austenite was successfully obtained by austempering. Tensile testing at room temperature revealed a high strength of 1.3 GPa with adequate elongation. A change in texture of retained austenite brought about by tensile deformation to several strains was measured. Deformation-induced martensitic transformation occurred in grains with the tensile axis nearly parallel to fcc was significantly stabilized. The Orientation Dependence of the martensitic transformation was compatible with that of the {1-11}fcc fcc shear deformation which can be regarded as the first primitive process for the martensitic transformation as proposed by Bogers and Burgers. This compatibility is discussed in terms of the elastically normalized Schmid factor for the transformation dislocation to act for the lattice change.
Limei Zheng - One of the best experts on this subject based on the ideXlab platform.
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Complete set of material constants of single domain (K, Na)(Nb, Ta)O3 single crystal and their Orientation Dependence
Applied physics letters, 2014Co-Authors: Limei Zheng, Shijing Sang, Junjun Wang, Xiaoqing Huo, Rui Wang, Zhongyuan Yuan, Wenwu CaoAbstract:A self-consistent complete set of dielectric, piezoelectric, and elastic constants for single domain Ta modified (K, Na)NbO3 (KNN) crystal was determined. This full set constant for single domain KNN-based crystals allowed the prediction of Orientation Dependence of the longitudinal dielectric, piezoelectric, elastic coefficients, and electromechanical coupling factors. The maximum piezoelectric and electromechanical properties were found to exist near [001]C. In addition, material constants of [001]C poled domain engineered single crystal with 4 mm symmetry were experimentally measured and compared with the calculated values. Based on this, extrinsic contribution to the piezoelectricity was estimated to be ∼20%.
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Orientation Dependence of piezoelectric properties and mechanical quality factors of 0 27pb in1 2nb1 2 o3 0 46pb mg1 3nb2 3 o3 0 27pbtio3 mn single crystals
Journal of Applied Physics, 2013Co-Authors: Raffi Sahul, Limei Zheng, Shujun Zhang, Wenhua Jiang, Wenwu CaoAbstract:The complete set of material constants of single domain rhombohedral phase 0.27Pb(In1/2Nb1/2)O3-0.46Pb(Mg1/3Nb2/3)O3-0.27PbTiO3:Mn single crystal has been determined. The Orientation Dependence of piezoelectric, dielectric, and electromechanical properties was calculated based on these single domain data. The maximum piezoelectric and electromechanical properties were found to exist near the [001]C pseudo-cubic direction. In addition, the piezoelectric properties of [001]C poled crystals with “4R” multi-domain configuration were experimentally measured and compared with the calculated values. Only a small difference (3%) was found between experimental and theoretical values, indicating the high piezoelectric properties in the “4R” state are mainly from intrinsic contributions. The mechanical quality factors Q33 are significantly improved by the Mn-doping for the “4R” domain engineered crystals but almost no change for the single domain “1R” state. On the other hand, Q15 of both single domain and multidoma...