Methods of Measurement and Evaluation of Texture （3）Neutron Diffraction

Progress in Bulk Texture Measurement Using Neutron Diffraction

“…For X-ray diffraction, it is necessary to carry out the angle dependent defocusing correction and the absorption correction, and the improper X-ray diffraction intensity correction during the pole figure measurement with the Schulz's reflection method and the Decker's transmission method may result into the significant uncertainty [5]. In addition, the different X-ray target may also lead to some difference in the pole figure measurement because of different penetration depths into the sample underneath.…”

“…Because textures are modified by all kinds of orientation dependent physical processes during the material manufacture/preparation [1], the quantitative texture evaluation is an important academic field related to materials engineering. Different with the conventional X-ray diffraction and the electron backscattering diffraction, the neutron diffraction can directly measure the bulk textures of various materials and provide high statistical texture information for predicting the material anisotropic property because of the large beam spot and the high matter penetrability [2][3][4][5][6], and it is powerful to monitor in situ microstructure evolutions under various loading/temperature environments [7][8][9][10][11]. Considering the potential contribution to the engineering materials, JAEA upgraded two angle dispersive neutron diffractometers [6] and TAKUMI time-of-flight neutron diffractometer [12] to increase the accessibility and flexibility of neutron diffraction facilities for bulk texture evaluation.…”