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Effects of pre-deformation on microstructural evolution of 12Cr ODS steel under 1473–1673 K annealing
The effects of various thickness reductions in cold rolling on the microstructural evolution of the 12Cr ODS steel after the subsequent 1473–1673 K annealing were studied by means of scanning electron microscopy, electron backscatter diffraction, and transmission electron microscopy. Results revealed that a larger thickness reduction generated higher stored energy and more homogeneous γ-fiber with {111} parallel to the normal direction, which evidently facilitates the recrystallization process. Moreover, heterogeneous distribution of voids was developed, and the size and area fraction were reduced with higher deformation at 1473 K and 1573 K. Partial recrystallization was observed with a reduction of 60% while abnormal grain growth took place with larger reductions, leading to the dominant {110} 〈 001 〉 component. Additionally, the average diameter and number density of nanoscale oxide particles were not significantly dependent on the deformation strain, whereas the grain size increased with a larger thickness reduction. Keywords: Oxide dispersion strengthened steel, Cold rolling, Annealing, Voids, Oxide particle coarsening, Abnormal grain growth
Effects of pre-deformation on microstructural evolution of 12Cr ODS steel under 1473–1673 K annealing
The effects of various thickness reductions in cold rolling on the microstructural evolution of the 12Cr ODS steel after the subsequent 1473–1673 K annealing were studied by means of scanning electron microscopy, electron backscatter diffraction, and transmission electron microscopy. Results revealed that a larger thickness reduction generated higher stored energy and more homogeneous γ-fiber with {111} parallel to the normal direction, which evidently facilitates the recrystallization process. Moreover, heterogeneous distribution of voids was developed, and the size and area fraction were reduced with higher deformation at 1473 K and 1573 K. Partial recrystallization was observed with a reduction of 60% while abnormal grain growth took place with larger reductions, leading to the dominant {110} 〈 001 〉 component. Additionally, the average diameter and number density of nanoscale oxide particles were not significantly dependent on the deformation strain, whereas the grain size increased with a larger thickness reduction. Keywords: Oxide dispersion strengthened steel, Cold rolling, Annealing, Voids, Oxide particle coarsening, Abnormal grain growth
Effects of pre-deformation on microstructural evolution of 12Cr ODS steel under 1473–1673 K annealing
Jingjie Shen (Autor:in) / Huilong Yang (Autor:in) / Zishou Zhao (Autor:in) / John McGrady (Autor:in) / Sho Kano (Autor:in) / Hiroaki Abe (Autor:in)
2018
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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