ものづくり現場における小型中性子源の利用; 金属加工への活用

Utilization of compact neutron source at manufacturing sites; Application to metal forming technology

高村 正人*; 岩本 ちひろ*; 徐 平光   ; 上野 孝太*; 栗原 諒*; 鈴木 裕士  ; 大竹 淑恵*

Takamura, Masato*; Iwamoto, Chihiro*; Xu, P. G.; Ueno, Kota*; Kurihara, Ryo*; Suzuki, Hiroshi; Otake, Yoshie*

Plastic forming processes of metallic sheets, , forging, rolling, bending, pressing, drawing, and extruding, are important manufacturing methods to produce complex mechanical parts. Numerical simulation using the finite element method based on the crystal plasticity theory has been thought valuable to improve the forming accuracy and reduce the forming defects, especially for high strength automotive metallic sheets. For the realization of reliable numerical modelling and the development of strength-formability well-balanced novel metallic sheets, the bulk average microstructure information closely related to the mechanical characteristics is highly expected to be on-site available, or at least may be measured in time through neutron diffraction. Towards these on-site neutron diffraction measurement requirements from forming process designers and materials researchers, RIKEN has developed an accelerator-driven compact neutron source (RANS) and realized the texture and phase fraction measurement at a good precision level. Recently, a novel residual measurement technique using RANS is being carried out.