著者

松田 翔太 政田 尚也 塩澤 大輝 中井 善一 三浦 亮太郎

出版者

一般社団法人日本機械学会

雑誌

M&M材料力学カンファレンス

巻号頁・発行日

vol.2013, pp."OS1503-1"-"OS1503-3", 2013-10-12

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X-ray diffraction contrast tomography (DCT) is a technique for three-dimensional grain mapping of polycrystalline material. Measurement of DCT has been conducted m SPring-8 and shape and location of grain can be determined by DCT technique using the apparatus in BL19B2. For evaluation of plastic deformation by DCT, tensile and cyclic loading was applied to the sample during the measurement of DCT. The diffraction spots belonging to certain grain appear over some continuous projection images. The rotation angle range where diffraction spot appear is defined as grain orientation spread, and the grain orientation spread was counted in tensile tests and fatigue test. In the tensile test, the grain orientation spread increases in the plastic deformation. In the fatigue test, grain orientation spread increases with increasing m the number of cycles. It is possible to evaluate fatigue damage by DCT technique and using the grain orientation spread.

著者

三浦 亮太郎 松田 翔太 塩澤 大輝 中井 善一

出版者

一般社団法人日本機械学会

雑誌

関西支部講演会講演論文集

巻号頁・発行日

vol.2013, no.88, pp."4-29", 2013-03-16

著者

松田 翔太 竹治 幸大 野村 健志 澤良木 詠一 梅原 康次 堀尾 修 山脇 吉朗

出版者

一般社団法人 日本創傷外科学会

雑誌

創傷

巻号頁・発行日

vol.8, no.3, pp.97-100, 2017

著者

中井 善一 塩澤 大輝 松田 翔太 中尾 亮太 浅川 直也 菊池 将一

出版者

一般社団法人日本機械学会

雑誌

関西支部講演会講演論文集

巻号頁・発行日

vol.2015, pp.86-89, 2015

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The three dimensional grain mapping technique for polycrystalline material, called X-ray diffraction contrast tomography (DCT), was conducted in SPring-8 (Super Photon ring-8 GeV), which is the brightest synchrotron radiation facility in Japan, and the conditions of measurement and data processing procedure have been obtained. Developed technique was applied to a commercially pure iron, and an austenitic stainless steel. The shape and location of grain could be determined by DCT using the apparatus in a beam line of SPring-8. Total misorientation of an individual crystalographic plane of a specific grain during fatigue test of the steels were measured. In fatigue test of the stainless steel, thetotal misorientastion of {111} planes increased with number of cyccles. Among {111} planes, the amount of change depended on Schmid factor, i.e., the change was higher for planes with larger Schmid factor. For the commercially pure iron, the total misorientastion of {110} planes increased with number of cyccles. The amount of change, however, did not depend on Schmid factor because of pencile-glide. The effect of cross-slip should be considered

著者

中尾 亮太 淺川 直也 松田 翔太 塩澤 大輝 菊池 将一 中井 善一

出版者

一般社団法人日本機械学会

雑誌

M&M材料力学カンファレンス

巻号頁・発行日

vol.2015, pp._GS0205-42-_GS0205-42, 2015

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A three dimensional grain mapping technique for polycrystalline materials, called X-ray diffraction contrast tomography (DCT), was developed at SPring-8 (Super Photon ring-8 GeV), which is the brightest synchrotron radiation facility in Japan. To evaluate the fatigue damage of grains, total misorientation, β for each grain was calculated from DCT measurement. It is found that value of β increases with number of cycles, and change of β for primary slip plane is the largest in diffraction planes. In addition, the largest change of β, was observed in the diffraction plane with the largest Schmid factor, F_s in equivalent primary slip planes. From this results, it is found that change of β reflects slip behavior in a grain, because change of β correspond to Schmid factor in fcc materials which can be determined the primary slip direction.

著者

吉川 隆 森 優樹 境 新 中田 夢元 桂山 卓也 服部 広 松田 翔太 山門 怜史

出版者

一般社団法人電子情報通信学会

雑誌

電子情報通信学会ソサイエティ大会講演論文集

巻号頁・発行日

vol.2014, no.2, 2014-09-09