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Bulk texture evaluation technique using TAKUMI time-of-flight neutron diffraction

Xu, P. G.   ; Ito, Takayoshi*; Harjo, S.   ; Akita, Koichi; Aizawa, Kazuya  ; Vogel, S. C.*; Kockelmann, W.*

Neutron diffraction may easily obtain the bulk information of various materials from the ex-situ/in-situ stress/strain change, the crystallographic structure evolution to the crystallographic preferred orientation rotation because of high penetrability of neutron beams. Though two angle dispersive diffractometers have been upgraded at JAEA for bulk texture evaluation of coarse-grained materials, structure-anisotropic materials, low symmetric materials as well as various metallic materials, the measurement speed is slow which makes it difficult to carry out in situ texture measurements. In order to improve measurement efficiency and increase the accessibility for general users, the time-of-flight neutron diffraction bulk texture evaluation technique is being developed urgently. Here, our bulk texture measurement research and development activities on TAKUMI will be introduced, including our recent experiment results using overseas time-of-flight neutron diffraction facilities.

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