The Experts below are selected from a list of 12888 Experts worldwide ranked by ideXlab platform
Ke Yang - One of the best experts on this subject based on the ideXlab platform.
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grain growth and hall petch relation in dual sized ferrite Cementite steel with nano sized Cementite particles in a heterogeneous and dense distribution
Scripta Materialia, 2006Co-Authors: Ming-chun Zhao, Kotobu Nagai, Toshihiro Hanamura, Hai Qiu, Ke YangAbstract:Abstract Characteristic grain growth occurred coincident with the Ostwald ripening of Cementite particles upon annealing in a submicron-grained ferrite/Cementite steel. The predictive capability of the Hall–Petch relation between the hardness and average ferrite size was demonstrated, independent of the distribution and size of Cementite particles.
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Grain growth and Hall–Petch relation in dual-sized ferrite/Cementite steel with nano-sized Cementite particles in a heterogeneous and dense distribution
Scripta Materialia, 2006Co-Authors: Ming-chun Zhao, Kotobu Nagai, Toshihiro Hanamura, Hai Qiu, Ke YangAbstract:Abstract Characteristic grain growth occurred coincident with the Ostwald ripening of Cementite particles upon annealing in a submicron-grained ferrite/Cementite steel. The predictive capability of the Hall–Petch relation between the hardness and average ferrite size was demonstrated, independent of the distribution and size of Cementite particles.
Reiner Kirchheim - One of the best experts on this subject based on the ideXlab platform.
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atomic scale investigation of redistribution of alloying elements in pearlitic steel wires upon cold drawing and annealing
Ultramicroscopy, 2013Co-Authors: C Borchers, Reiner Kirchheim, Shoji Goto, Yujiao Li, Pyuckpa Choi, Dierk RaabeAbstract:Abstract A local electrode atom probe has been employed to analyze the redistribution of alloying elements including Si, Mn, and Cr in pearlitic steel wires upon cold-drawing and subsequent annealing. It has been found that the three elements undergo mechanical mixing upon cold-drawing at large strains, where Mn and Cr exhibit a nearly homogeneous distribution throughout both ferrite and Cementite, whereas Si only dissolves slightly in Cementite. Annealing at elevated temperatures leads to a reversion of the mechanical alloying. Si atoms mainly segregate at well-defined ferrite (sub)grain boundaries formed during annealing. Cr and Mn are strongly concentrated in Cementite adjacent to the ferrite/Cementite interface due to their lower diffusivities in Cementite than in ferrite.
Ming-chun Zhao - One of the best experts on this subject based on the ideXlab platform.
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grain growth and hall petch relation in dual sized ferrite Cementite steel with nano sized Cementite particles in a heterogeneous and dense distribution
Scripta Materialia, 2006Co-Authors: Ming-chun Zhao, Kotobu Nagai, Toshihiro Hanamura, Hai Qiu, Ke YangAbstract:Abstract Characteristic grain growth occurred coincident with the Ostwald ripening of Cementite particles upon annealing in a submicron-grained ferrite/Cementite steel. The predictive capability of the Hall–Petch relation between the hardness and average ferrite size was demonstrated, independent of the distribution and size of Cementite particles.
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Grain growth and Hall–Petch relation in dual-sized ferrite/Cementite steel with nano-sized Cementite particles in a heterogeneous and dense distribution
Scripta Materialia, 2006Co-Authors: Ming-chun Zhao, Kotobu Nagai, Toshihiro Hanamura, Hai Qiu, Ke YangAbstract:Abstract Characteristic grain growth occurred coincident with the Ostwald ripening of Cementite particles upon annealing in a submicron-grained ferrite/Cementite steel. The predictive capability of the Hall–Petch relation between the hardness and average ferrite size was demonstrated, independent of the distribution and size of Cementite particles.
Kotobu Nagai - One of the best experts on this subject based on the ideXlab platform.
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grain growth and hall petch relation in dual sized ferrite Cementite steel with nano sized Cementite particles in a heterogeneous and dense distribution
Scripta Materialia, 2006Co-Authors: Ming-chun Zhao, Kotobu Nagai, Toshihiro Hanamura, Hai Qiu, Ke YangAbstract:Abstract Characteristic grain growth occurred coincident with the Ostwald ripening of Cementite particles upon annealing in a submicron-grained ferrite/Cementite steel. The predictive capability of the Hall–Petch relation between the hardness and average ferrite size was demonstrated, independent of the distribution and size of Cementite particles.
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Grain growth and Hall–Petch relation in dual-sized ferrite/Cementite steel with nano-sized Cementite particles in a heterogeneous and dense distribution
Scripta Materialia, 2006Co-Authors: Ming-chun Zhao, Kotobu Nagai, Toshihiro Hanamura, Hai Qiu, Ke YangAbstract:Abstract Characteristic grain growth occurred coincident with the Ostwald ripening of Cementite particles upon annealing in a submicron-grained ferrite/Cementite steel. The predictive capability of the Hall–Petch relation between the hardness and average ferrite size was demonstrated, independent of the distribution and size of Cementite particles.
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strain hardening due to dispersed Cementite for low carbon ultrafine grained steels
Isij International, 2004Co-Authors: Akio Ohmori, Shiro Torizuka, Kotobu NagaiAbstract:Strain(work)-hardening in tensile tests was examined for low carbon steels with various ferrite grain sizes ranged from 0.4 to 16 μm. The steels had microstructures composed of ferrite grains and dispersed Cementite particles. They were fabricated through warm caliber bar-rollings with an accumulative area reduction of 93%. Strain-hardening rate at a given strain increased with an increase in volume fraction of Cementite particles. The balance of yield strength and uniform elongation for ultrafine-grained structures could be improved by the dispersion of Cementite particles. Effects of the Cementite dispersion and the ferrite grain size on the strain-hardening rate can be roughly explained by the work-hardening model with GN-dislocation density. Strain-hardening design using dispersed Cementites was proved to be effective in controlling ductility of the ultrafine-grained steels.
Yujiao Li - One of the best experts on this subject based on the ideXlab platform.
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atomic scale investigation of redistribution of alloying elements in pearlitic steel wires upon cold drawing and annealing
Ultramicroscopy, 2013Co-Authors: C Borchers, Reiner Kirchheim, Shoji Goto, Yujiao Li, Pyuckpa Choi, Dierk RaabeAbstract:Abstract A local electrode atom probe has been employed to analyze the redistribution of alloying elements including Si, Mn, and Cr in pearlitic steel wires upon cold-drawing and subsequent annealing. It has been found that the three elements undergo mechanical mixing upon cold-drawing at large strains, where Mn and Cr exhibit a nearly homogeneous distribution throughout both ferrite and Cementite, whereas Si only dissolves slightly in Cementite. Annealing at elevated temperatures leads to a reversion of the mechanical alloying. Si atoms mainly segregate at well-defined ferrite (sub)grain boundaries formed during annealing. Cr and Mn are strongly concentrated in Cementite adjacent to the ferrite/Cementite interface due to their lower diffusivities in Cementite than in ferrite.