Microstructural characterization and strengthening mechanisms of a 12Cr-ODS steel

Jingjie Shen, Yanfen Li, Feng Li, Huilong Yang, Zishou Zhao, Sho Kano, Yoshitaka Matsukawa, Yuhki Satoh, Hiroaki Abe

研究成果: Article査読

65 被引用数 (Scopus)


The microstructure of the 12Cr-ODS steel was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electron backscatter diffraction (EBSD) techniques. The results showed that the microstructure consisted of fine and elongated grains, high density of dislocations, and large concentration of nm-scale oxide particles, which were identified as five types of crystal structures by high resolution TEM (HRTEM) imaging, such as monoclinic and cubic Y2O3, hexagonal and orthorhombic Y2TiO5, and cubic Y2Ti2O7. The dominant {001}<110> component and weaker <111> parallel to normal direction texture were observed. Besides, the yield stress was experimentally measured and quantitatively estimated. The findings indicated that theoretical calculation was in accordance with the experimental measurements, and strengthening contributions from solid-solution atoms and grain boundaries were linearly additive, whereas those from dislocations and oxide dispersoids were averaged by root mean square summation.

ジャーナルMaterials Science and Engineering A
出版ステータスPublished - 2016 9 15

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学


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