Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Microstructural evolution of two-way cold rolled 12Cr ODS steel under 1073–1373 K annealing
Microstructural evolution and hardness variations of cold rolled 12Cr ODS steel with 60%–90% thickness reductions after 1073–1373 K annealing were systematically studied by electron backscatter diffraction technique, transmission electron microscopy, and Vickers hardness measurements. Recovery took place with heating up to 1273 K in specimens with 60% thickness reduction accompanying with gradual hardness decrease, and followed by recrystallization at 1373 K with an evident hardness reduction. By contrast, regarding specimens with 75% and 90% thickness reductions, recrystallization was observed at 1273 K which is 100 K lower than that of 60% thickness reduction, and 400 K lower than that of as-fabricated specimen without further cold rolling, indicating that a higher thickness reduction stimulated the onset of recrystallization at a lower temperature. Furthermore, partial recrystallization was characterized at 1073 K and 1173 K in the specimen with 90% thickness reduction, which produced equiaxed grain bands along the final rolling direction with none/lower density of oxide particles, and full recrystallization occurred at 1273 K and above, forming coarse elongated grains with high density of oxide particles and a smaller fraction of equiaxed grains. These bimodal grains were probably ascribed to heterogeneous distribution of oxide particles in the matrix, which were partially dissolved during cold rolling process, and re-precipitated after the thermal annealing.
Microstructural evolution of two-way cold rolled 12Cr ODS steel under 1073–1373 K annealing
Microstructural evolution and hardness variations of cold rolled 12Cr ODS steel with 60%–90% thickness reductions after 1073–1373 K annealing were systematically studied by electron backscatter diffraction technique, transmission electron microscopy, and Vickers hardness measurements. Recovery took place with heating up to 1273 K in specimens with 60% thickness reduction accompanying with gradual hardness decrease, and followed by recrystallization at 1373 K with an evident hardness reduction. By contrast, regarding specimens with 75% and 90% thickness reductions, recrystallization was observed at 1273 K which is 100 K lower than that of 60% thickness reduction, and 400 K lower than that of as-fabricated specimen without further cold rolling, indicating that a higher thickness reduction stimulated the onset of recrystallization at a lower temperature. Furthermore, partial recrystallization was characterized at 1073 K and 1173 K in the specimen with 90% thickness reduction, which produced equiaxed grain bands along the final rolling direction with none/lower density of oxide particles, and full recrystallization occurred at 1273 K and above, forming coarse elongated grains with high density of oxide particles and a smaller fraction of equiaxed grains. These bimodal grains were probably ascribed to heterogeneous distribution of oxide particles in the matrix, which were partially dissolved during cold rolling process, and re-precipitated after the thermal annealing.
Microstructural evolution of two-way cold rolled 12Cr ODS steel under 1073–1373 K annealing
Jingjie Shen (Autor:in) / Takuya Nagasaka (Autor:in) / Takeo Muroga (Autor:in) / Huilong Yang (Autor:in) / Sho Kano (Autor:in) / Hiroaki Abe (Autor:in)
2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Metadata by DOAJ is licensed under CC BY-SA 1.0
| DOAJ | 2018
| British Library Online Contents | 2005
Microstructural Coarsening during Annealing of Cold Rolled Aluminum
| British Library Online Contents | 2004
Microstructural evolution and mechanical properties of friction stir welded 12Cr-ODS steel
| DOAJ | 2020
Microstructural characterization and strengthening mechanisms of a 12Cr-ODS steel
| British Library Online Contents | 2016