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Cho, K.*; 森岡 亮太*; Harjo, S.; 川崎 卓郎; 安田 弘行*
Scripta Materialia, 177, p.106 - 111, 2020/03
被引用回数:35 パーセンタイル:92.02(Nanoscience & Nanotechnology)Deformation behavior of Ti-12Mo alloy which is primarily deformed by {332}113 deformation twinning was studied by in situ neutron diffraction measurements and deformation structure analyses, focusing on the formation of stress-induced martensite phase. We directly observed for the first time that the phase was formed at the initial stage of the plastic deformation and the volume fraction of the phase increased with increasing plastic deformation. This stress-induced martensite phase acts as a nucleation site for the {332}113 twins. Further increase in stress results in a replacement of the phase by the {332}113 twins.
Shamsuzzaman, M.*; 堀江 達郎*; 浮池 亮太*; 神山 基紀*; 森岡 徹*; 松元 達也*; 守田 幸路*; 田上 浩孝; 鈴木 徹*; 飛田 吉春
Annals of Nuclear Energy, 111, p.474 - 486, 2018/01
被引用回数:17 パーセンタイル:85.18(Nuclear Science & Technology)Particle bed characteristics are experimentally investigated for the sedimentation and subsequent bed formation of solid particles, related to the coolability aspects in core-disruptive accidents. Presently a series of experiments with gravity driven discharge of solid particles into a quiescent water pool was performed to evaluate bed formation characteristic in the course of particle sedimentation. We evaluated the effects of the crucial factors: nozzle diameter, particle density, particle diameter and nozzle height on four key quantitative parameters of bed shape: mound dimple area, mound dimple volume, repose angle and mound height to illustrate the role of the crucial factors on forming the particle bed shape. The investigated crucial factors exhibit a significant role that diversifies the particle bed formation process. Based on the data obtained in the experimental observations, we developed an empirical correlation to compare the predicted results with the experimental bed heights. The proposed empirical correlation can reasonably demonstrate the general trend of the experimental bed height. This correlation could be useful to assess the particle bed elevation, and to identify the governing parameters.