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Report No.

Time-of-flight neutron Bragg-edge transmission imaging of microstructures in bent steel plates

Su, Y. ; Oikawa, Kenichi  ; Harjo, S.  ; Shinohara, Takenao  ; Kai, Tetsuya  ; Harada, Masahide  ; Hiroi, Kosuke ; Zhang, S.*; Parker, J. D.*; Sato, Hirotaka*; Shiota, Yoshinori*; Kiyanagi, Yoshiaki*; Tomota, Yo*

Neutron Bragg-edge transmission imaging makes it possible to quantitatively visualize the two-dimensional distribution of microstructure within a sample. In order to examine its application to engineering products, time-of-flight Bragg-edge transmission imaging experiments using a pulsed neutron source were performed for plastically bent plates composed of a ferritic steel and a duplex stainless steel. The non-homogeneous microstructure distributions, such as texture, crystalline size, phase volume fraction and residual elastic strain, were evaluated for the cross sections of the bent plates. The obtained results were compared with those by neutron diffraction and electron back scatter diffraction, showing that the Bragg-edge transmission imaging is powerful for engineering use.



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Category:Nanoscience & Nanotechnology



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