Quantitative measurements of residual stress and crystallographic texture of engineering materials

工学材料の残留応力と集合組織の定量測定

徐 平光   ; 諸岡 聡  ; 柴山 由樹; Wu, S. C.*; Fang, W.*; 菖蒲 敬久  

Xu, P. G.; Morooka, Satoshi; Shibayama, Yuki; Wu, S. C.*; Fang, W.*; Shobu, Takahisa

Because of large spot size and high penetrability, neutron diffraction can acquire the averaged crystal structure information of engineering materials and even monitor their microstructure and texture evolutions in artificially simulated extreme environments. Though many novel neutron engineering diffractometers have been established with either high or low thermal beam fluxes for residual stress and texture measurements, there is still an expectation that the classic neutron diffractometers at nuclear research reactors, such as the Japan Research Reactor No.3 (JRR-3), will be able to support broader neutron diffraction application studies not limited to metals, alloys, ceramics, composite materials, and even geological materials. In this oral presentation, we will briefly review the current status of the Neutron Diffractometer for Residual Stress Analysis (RESA), and then introduce the latest research highlights including the gradient residual stress distribution of induction hardened carbon steel S38C for high-speed train axles and the cold rolling texture evolution of high-entropy alloys as an advanced radiation-resistant structural material.