The Experts below are selected from a list of 5433 Experts worldwide ranked by ideXlab platform
Xinsheng Huang - One of the best experts on this subject based on the ideXlab platform.
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Static recrystallization and mechanical properties of Mg–4Y–3RE magnesium alloy Sheet processed by differential speed rolling at 823 K
Materials Science and Engineering: A, 2012Co-Authors: Xinsheng Huang, Kazutaka Suzuki, Yasumasa ChinoAbstract:Abstract The microstructural and textural evolution during post-annealing as well as mechanical properties of a Mg–4Y–3RE magnesium alloy Sheet processed by differential speed rolling at 823 K were investigated. The as-Rolled Sheet exhibits deformation microstructure regardless of the high rolling temperature. Static recrystallization occurs around second-phase particles as a result of particle-stimulated nucleation and also at pre-existing grain boundaries due to solute effects of rare-earth elements, resulting in randomization of basal texture. Despite a large amount of second-phase particles, the weakened texture leads to a moderate stretch formability with an Erichsen value of 4.4.
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improvement of stretch formability of pure titanium Sheet by differential speed rolling
Scripta Materialia, 2010Co-Authors: Xinsheng Huang, Kazutaka Suzuki, Yasumasa ChinoAbstract:Differential speed rolling (DSR) was carried out on commercial pure titanium at rolling temperatures from room temperature to 773 K. The basal texture appears when the rolling temperature is higher than 573 K and it lacks stability during annealing. Originating from texture effects, the DSRed Sheet exhibits a larger Lankford value and a smaller planar anisotropy, which lead to a remarkable improvement in stretch formability regardless of a decrease in tensile elongation compared with symmetrically Rolled Sheet.
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microstructure and mechanical properties of az80 magnesium alloy Sheet processed by differential speed rolling
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2009Co-Authors: Xinsheng Huang, Kazutaka Suzuki, Naobumi SaitoAbstract:A heat-treatable AZ80 magnesium alloy has been subjected to differential speed rolling (DSR) at a large thickness reduction per pass of 33%, and microstructure, texture, mechanical properties, stretch formability as well as texture evolution during stretch forming have been investigated. The basal pole of the DSR-processed Sheet tilts toward the rolling direction at 15°. The as-Rolled Sheet exhibits a combination of high strength (tensile strength: 329 MPa) and high ductility (fracture elongation: 25%). The Erichsen value at room temperature improves from 3.7 to 4.5 compared with the normal-Rolled Sheet. The enhancement of the stretch formability can be attributed to the texture effects due to the same grain size of 7 μm. The DSR-processed Sheet exhibits a larger Schmid factor for basal slip and the inclination of basal pole retains during the stretch forming. The aging treatment remarkably enhances the mechanical strength further while it significantly deteriorates the formability.
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improvement of formability of mg al zn alloy Sheet at low temperatures using differential speed rolling
Journal of Alloys and Compounds, 2009Co-Authors: Xinsheng Huang, Kazutaka Suzuki, Akira Watazu, Ichinori Shigematsu, Naobumi SaitoAbstract:The differential speed rolling (DSR) with a roll speed ratio of 1.167 was carried out on an AZ31B magnesium alloy in order to investigate its effects on the formability. Compared with the normal Rolled Sheet exhibiting approximately the same average grain size, the Erichsen values of the DSR processed Sheet with an inclination of basal pole in the rolling direction significantly increased by about 1.5 and 1.9 times at room temperature and at 423 K, respectively. The deep-drawing temperature limit for a drawing ratio of 1.5 was also lowered from 443 K to 423 K. The improvement of the press formability at low temperatures can be attributed to the texture modifications, which led to a lower 0.2% proof stress, a larger uniform elongation, a smaller Lankford value and a larger strain hardening exponent.
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mechanical properties of mg al zn alloy with a tilted basal texture obtained by differential speed rolling
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2008Co-Authors: Xinsheng Huang, Kazutaka Suzuki, Akira Watazu, Ichinori Shigematsu, Naobumi SaitoAbstract:Abstract The mechanical properties of the differential-speed-Rolled Mg–3Al–1Zn alloy Sheet with a basal pole tilted at about 15° in the rolling direction were systematically investigated at room temperature. Compared with the normal symmetrically Rolled Sheet exhibiting approximately the same average grain size, the uniform elongation and the strain hardening exponent increased while the proof stress and the Lankford value decreased especially in the rolling direction. The c-axis tilted texture activated the { 1 0 1 ¯ 2 } extension twinning at the early stage of tensile deformation, and depressed the dynamic recovery and in turn enhanced the uniform elongation. The initial texture had a significant influence on the deformation at the initial stage while it showed a much weaker effect on the deformation after reaching the strain instability condition.
Naobumi Saito - One of the best experts on this subject based on the ideXlab platform.
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Effect of Reduction in Thickness and Rolling Conditions on Mechanical Properties and Microstructure of Rolled Mg-8Al-1Zn-1Ca Alloy
Hindawi Limited, 2017Co-Authors: Yuta Fukuda, Kazutaka Suzuki, Naobumi Saito, Masafumi Noda, Tomomi Ito, Yasumasa ChinoAbstract:A cast Mg-8Al-1Zn-1Ca magnesium alloy was multipass hot Rolled at different sample and roll temperatures. The effect of the rolling conditions and reduction in thickness on the microstructure and mechanical properties was investigated. The optimal combination of the ultimate tensile strength, 351 MPa, yield strength, 304 MPa, and ductility, 12.2%, was obtained with the 3 mm thick Mg-8Al-1Zn-1Ca Rolled Sheet, which was produced with a roll temperature of 80°C and sample temperature of 430°C. This rolling process resulted in the formation of a bimodal structure in the α-Mg matrix, which consequently led to good ductility and high strength, exclusively by the hot rolling process. The 3 mm thick Rolled Sheet exhibited fine (mean grain size of 2.7 μm) and coarse grain regions (mean grain size of 13.6 μm) with area fractions of 29% and 71%, respectively. In summary, the balance between the strength and ductility was enhanced by the grain refinement of the α-Mg matrix and by controlling the frequency and orientation of the grains
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microstructure and mechanical properties of az80 magnesium alloy Sheet processed by differential speed rolling
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2009Co-Authors: Xinsheng Huang, Kazutaka Suzuki, Naobumi SaitoAbstract:A heat-treatable AZ80 magnesium alloy has been subjected to differential speed rolling (DSR) at a large thickness reduction per pass of 33%, and microstructure, texture, mechanical properties, stretch formability as well as texture evolution during stretch forming have been investigated. The basal pole of the DSR-processed Sheet tilts toward the rolling direction at 15°. The as-Rolled Sheet exhibits a combination of high strength (tensile strength: 329 MPa) and high ductility (fracture elongation: 25%). The Erichsen value at room temperature improves from 3.7 to 4.5 compared with the normal-Rolled Sheet. The enhancement of the stretch formability can be attributed to the texture effects due to the same grain size of 7 μm. The DSR-processed Sheet exhibits a larger Schmid factor for basal slip and the inclination of basal pole retains during the stretch forming. The aging treatment remarkably enhances the mechanical strength further while it significantly deteriorates the formability.
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improvement of formability of mg al zn alloy Sheet at low temperatures using differential speed rolling
Journal of Alloys and Compounds, 2009Co-Authors: Xinsheng Huang, Kazutaka Suzuki, Akira Watazu, Ichinori Shigematsu, Naobumi SaitoAbstract:The differential speed rolling (DSR) with a roll speed ratio of 1.167 was carried out on an AZ31B magnesium alloy in order to investigate its effects on the formability. Compared with the normal Rolled Sheet exhibiting approximately the same average grain size, the Erichsen values of the DSR processed Sheet with an inclination of basal pole in the rolling direction significantly increased by about 1.5 and 1.9 times at room temperature and at 423 K, respectively. The deep-drawing temperature limit for a drawing ratio of 1.5 was also lowered from 443 K to 423 K. The improvement of the press formability at low temperatures can be attributed to the texture modifications, which led to a lower 0.2% proof stress, a larger uniform elongation, a smaller Lankford value and a larger strain hardening exponent.
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mechanical properties of mg al zn alloy with a tilted basal texture obtained by differential speed rolling
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2008Co-Authors: Xinsheng Huang, Kazutaka Suzuki, Akira Watazu, Ichinori Shigematsu, Naobumi SaitoAbstract:Abstract The mechanical properties of the differential-speed-Rolled Mg–3Al–1Zn alloy Sheet with a basal pole tilted at about 15° in the rolling direction were systematically investigated at room temperature. Compared with the normal symmetrically Rolled Sheet exhibiting approximately the same average grain size, the uniform elongation and the strain hardening exponent increased while the proof stress and the Lankford value decreased especially in the rolling direction. The c-axis tilted texture activated the { 1 0 1 ¯ 2 } extension twinning at the early stage of tensile deformation, and depressed the dynamic recovery and in turn enhanced the uniform elongation. The initial texture had a significant influence on the deformation at the initial stage while it showed a much weaker effect on the deformation after reaching the strain instability condition.
Kazutaka Suzuki - One of the best experts on this subject based on the ideXlab platform.
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Effect of Reduction in Thickness and Rolling Conditions on Mechanical Properties and Microstructure of Rolled Mg-8Al-1Zn-1Ca Alloy
Hindawi Limited, 2017Co-Authors: Yuta Fukuda, Kazutaka Suzuki, Naobumi Saito, Masafumi Noda, Tomomi Ito, Yasumasa ChinoAbstract:A cast Mg-8Al-1Zn-1Ca magnesium alloy was multipass hot Rolled at different sample and roll temperatures. The effect of the rolling conditions and reduction in thickness on the microstructure and mechanical properties was investigated. The optimal combination of the ultimate tensile strength, 351 MPa, yield strength, 304 MPa, and ductility, 12.2%, was obtained with the 3 mm thick Mg-8Al-1Zn-1Ca Rolled Sheet, which was produced with a roll temperature of 80°C and sample temperature of 430°C. This rolling process resulted in the formation of a bimodal structure in the α-Mg matrix, which consequently led to good ductility and high strength, exclusively by the hot rolling process. The 3 mm thick Rolled Sheet exhibited fine (mean grain size of 2.7 μm) and coarse grain regions (mean grain size of 13.6 μm) with area fractions of 29% and 71%, respectively. In summary, the balance between the strength and ductility was enhanced by the grain refinement of the α-Mg matrix and by controlling the frequency and orientation of the grains
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Static recrystallization and mechanical properties of Mg–4Y–3RE magnesium alloy Sheet processed by differential speed rolling at 823 K
Materials Science and Engineering: A, 2012Co-Authors: Xinsheng Huang, Kazutaka Suzuki, Yasumasa ChinoAbstract:Abstract The microstructural and textural evolution during post-annealing as well as mechanical properties of a Mg–4Y–3RE magnesium alloy Sheet processed by differential speed rolling at 823 K were investigated. The as-Rolled Sheet exhibits deformation microstructure regardless of the high rolling temperature. Static recrystallization occurs around second-phase particles as a result of particle-stimulated nucleation and also at pre-existing grain boundaries due to solute effects of rare-earth elements, resulting in randomization of basal texture. Despite a large amount of second-phase particles, the weakened texture leads to a moderate stretch formability with an Erichsen value of 4.4.
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improvement of stretch formability of pure titanium Sheet by differential speed rolling
Scripta Materialia, 2010Co-Authors: Xinsheng Huang, Kazutaka Suzuki, Yasumasa ChinoAbstract:Differential speed rolling (DSR) was carried out on commercial pure titanium at rolling temperatures from room temperature to 773 K. The basal texture appears when the rolling temperature is higher than 573 K and it lacks stability during annealing. Originating from texture effects, the DSRed Sheet exhibits a larger Lankford value and a smaller planar anisotropy, which lead to a remarkable improvement in stretch formability regardless of a decrease in tensile elongation compared with symmetrically Rolled Sheet.
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microstructure and mechanical properties of az80 magnesium alloy Sheet processed by differential speed rolling
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2009Co-Authors: Xinsheng Huang, Kazutaka Suzuki, Naobumi SaitoAbstract:A heat-treatable AZ80 magnesium alloy has been subjected to differential speed rolling (DSR) at a large thickness reduction per pass of 33%, and microstructure, texture, mechanical properties, stretch formability as well as texture evolution during stretch forming have been investigated. The basal pole of the DSR-processed Sheet tilts toward the rolling direction at 15°. The as-Rolled Sheet exhibits a combination of high strength (tensile strength: 329 MPa) and high ductility (fracture elongation: 25%). The Erichsen value at room temperature improves from 3.7 to 4.5 compared with the normal-Rolled Sheet. The enhancement of the stretch formability can be attributed to the texture effects due to the same grain size of 7 μm. The DSR-processed Sheet exhibits a larger Schmid factor for basal slip and the inclination of basal pole retains during the stretch forming. The aging treatment remarkably enhances the mechanical strength further while it significantly deteriorates the formability.
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improvement of formability of mg al zn alloy Sheet at low temperatures using differential speed rolling
Journal of Alloys and Compounds, 2009Co-Authors: Xinsheng Huang, Kazutaka Suzuki, Akira Watazu, Ichinori Shigematsu, Naobumi SaitoAbstract:The differential speed rolling (DSR) with a roll speed ratio of 1.167 was carried out on an AZ31B magnesium alloy in order to investigate its effects on the formability. Compared with the normal Rolled Sheet exhibiting approximately the same average grain size, the Erichsen values of the DSR processed Sheet with an inclination of basal pole in the rolling direction significantly increased by about 1.5 and 1.9 times at room temperature and at 423 K, respectively. The deep-drawing temperature limit for a drawing ratio of 1.5 was also lowered from 443 K to 423 K. The improvement of the press formability at low temperatures can be attributed to the texture modifications, which led to a lower 0.2% proof stress, a larger uniform elongation, a smaller Lankford value and a larger strain hardening exponent.
Guodong Wang - One of the best experts on this subject based on the ideXlab platform.
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development of λ fiber recrystallization texture and magnetic property in fe 6 5 wt si thin Sheet produced by strip casting and warm rolling method
Materials Letters, 2013Co-Authors: Haitao Liu, Fei Gao, Zhenyu Liu, Yu Sun, Guodong WangAbstract:Abstract An 6.5 wt%Si–0.3 wt%Al non-oriented electrical steel as-cast Sheet with strong columnar grains was produced by twin-roll strip casting process, and subsequently treated with hot rolling, warm rolling and annealing. It was shown that the warm Rolled Sheet was characterized by strong α-fiber ( ∥RD), quite weak γ-fiber ( ∥ND) texture and inhomogeneous deformed microstructure. After annealing, desirable λ-fiber ( ∥ND) mainly including {001} ∼{001} components dominated the recrystallization texture while the γ-fiber had all but disappeared, thus the annealed Sheet showed a very high magnetic induction. It was indicated that the development of λ-fiber recrystallization texture could be attributed to the preferred nucleation and grain growth under the applied processes. The present study provides a new efficient way to optimize the recrystallization texture and improve the magnetic induction of high-silicon non-oriented electrical steel Sheet.
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formation of 001 recrystallization texture and magnetic property in strip casting non oriented electrical steel
Materials Letters, 2012Co-Authors: Haitao Liu, Zhenyu Liu, Yu Sun, Yiqing Qiu, Chenggang Li, Guangming Cao, Byungdeug Hong, Sanghoon Kim, Guodong WangAbstract:Abstract A 3.2 wt.%Si–0.7 wt.%Al non-oriented silicon steel as-cast Sheet with developed columnar grains and λ-fiber ( ∥ ND) texture was produced by twin-roll strip casting process, and subsequently treated with cold rolling and annealing. Texture evolution at each condition was investigated using macro-/microtexture analysis. It was shown that the cold Rolled Sheet was characterized by pronounced {001} ~{115} fiber and quite weak γ-fiber ( ∥ ND) texture. After annealing, the recrystallization texture was dominated by desirable λ-fiber with a peak at {001} together with extremely weak γ-fiber, and consequently the magnetic induction was significantly improved. It was indicated that the formation of {001} recrystallization texture could be attributed to the preferred nucleation and grain growth by the strain-induced grain boundary migration (SIBM) mechanism.
L Zuo - One of the best experts on this subject based on the ideXlab platform.
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development of 2 1 0 0 0 1 recrystallization texture in fe 6 5 wt si thin Sheets
Scripta Materialia, 2011Co-Authors: Jixing Liu, Yuhui Sha, Fang Zhang, Yongchuang Yao, L ZuoAbstract:Texture evolution in Fe–6.5 wt.% Si thin Sheets produced by rolling was investigated using macro-/microtexture analysis. Cold-Rolled Sheet is characterized by strong γ fiber (〈1 1 1〉//ND) and widely distributed shear bands through the thickness. The beneficial η fiber (〈0 0 1〉//RD) with a peak at {2 1 0}〈0 0 1〉 dominates the primary recrystallization texture even after considerable grain growth, and consequently the magnetic property is significantly improved. The development of {2 1 0}〈0 0 1〉 texture can be attributed to the favored nucleation and grain growth under the applied processing parameters.
