中性子ブラッグディップイメージングによる無酸素銅の粗大結晶粒組織の解析

抄録

Neutron Bragg–dip imaging is a promising characterization technique for copper and copper alloys because of its high penetration capability. In this study, analysis techniques of the neutron Bragg–dip imaging for the microstructural characterization of polycrystalline copper and copper alloys were developed using coarse–grained oxygen–free copper. The crystal directions of individual component grains were calculated from the wavelengths of Bragg dips observed in the neutron transmission spectra and shown as projected crystal direction (CD) maps. These maps successfully visualized not only the surface but also internal microstructure in the coarse–grained copper. The grain sizes along the neutron transmission direction were evaluated from the depth of the Bragg dips and shown as the grain size maps. These maps revealed the three–dimensional shapes of the individual component grains. The results demonstrated that these analysis and mapping techniques using the neutron Bragg–dip imaging were useful for the microstructural characterization of copper.