Characterization of microstructures and internal stresses of structural metals during deformation using operando neutron diffraction

オペランド中性子回折を用いた構造金属の変形過程における微細構造と内部応力の評価

Harjo, S.   ; 川崎 卓郎   ; Gong, W.   ; 宮本 吾郎*

Harjo, S.; Kawasaki, Takuro; Gong, W.; Miyamoto, Goro*

Pulsed neutron diffraction with the time-of-flight method is suitable for microscopic structural observation as a bulk average behavior because of the simultaneous measurement of multiple Bragg peaks. The large penetrating power of neutrons also allows in-situ investigation of crystallographic information on engineering materials under various environments, including operando monitoring during deformation at a wide temperature range from cryogenic to high temperatures, thermo-mechanical processes, and so on. The pulsed neutron diffraction with the time-of-flight method will be briefly introduced, and a pulsed neutron diffractometer for engineering materials studies in J-PARC with some highlighted researches using operando observations will be introduced.