• Ryufuku, Susumu

Abstract

A data analysis system has been developed to determine texture, lattice strain, block (or grain) size and dislocation density from neutron diffraction profiles obtained by an angular dispersive method. Because a neutron beam has higher penetrative power than an electron beam or an X-ray, the neutron beam was used to more clearly define the parameters outlined above.Neutron residual stress analysis is recently being used that derives lattice strain from Bragg diffraction peak shift. The peak profile obtained also can extract information of texture in its intensity and information of block size / dislocation density in its profile shape. X-ray diffraction profile analysis provides block size and dislocation density information. X-ray diffraction detects information only from the surface of a specimen while neutron diffraction detects information of bulk average. Neutron diffraction is more effective for developing new materials when considering their mechanical properties, and for increasing reliability testing of present materials.Trials of this type have not been widely used, and analysis methods / software are not yet well established. This study will show that an integrated data analysis system has been developed to evaluate the microstructure of steel materials using neutron diffraction.タイトル 中性子回折角度分散法による応力・組織因子解析システムの開発 著者 龍福 進 学位授与大学 茨城大学 取得学位 博士 (工学) 学位授与番号 甲第376号 学位授与年月日 2008-03-25

Topics

• density
• impedance spectroscopy
• surface
• grain
• x-ray diffraction
• steel
• neutron diffraction
• dislocation
• texture