TY - JOUR
T1 - Microstructural characterization and strengthening mechanisms of a 12Cr-ODS steel
AU - Shen, Jingjie
AU - Li, Yanfen
AU - Li, Feng
AU - Yang, Huilong
AU - Zhao, Zishou
AU - Kano, Sho
AU - Matsukawa, Yoshitaka
AU - Satoh, Yuhki
AU - Abe, Hiroaki
N1 - Funding Information:
This research was sponsored in part by a project “R&D of nuclear fuel cladding materials and their environmental degradations for the development of safety standards” entrusted to Tohoku University by Ministry of Education, Culture, Sports, Science and Technology (MEXT) in Japan. The authors would like to thank the support of China Scholarship Council.
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/9/15
Y1 - 2016/9/15
N2 - 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.
AB - 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.
KW - HRTEM
KW - Microstructure
KW - Nm-scale oxide particles
KW - Oxide dispersion strengthened steels
KW - Strengthening mechanisms
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U2 - 10.1016/j.msea.2016.07.030
DO - 10.1016/j.msea.2016.07.030
M3 - Article
AN - SCOPUS:84980318239
VL - 673
SP - 624
EP - 632
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -