Quantification of local dislocation density using 3D synchrotron monochromatic X-ray microdiffraction

作者：Guangni Zhou, Wolfgang Pantleon, Ruqing Xu, Wenjun Liu, Kai Chen, Yubin Zhang · 发表于：Materials Research Letters · 年份：2021 · DOI：10.1080/21663831.2020.1862932 · 被引用次数：19 · 研究领域：High Temperature Alloys and Creep、Microstructure and mechanical properties、Microstructure and Mechanical Properties of Steels

A novel approach evolved from the classical Wilkens’ method has been developed to quantify the local dislocation density based on X-ray radial profiles obtained by 3D synchrotron monochromatic X-ray microdiffraction. A deformed Ni-based superalloy consisting of γ matrix and γ′ precipitates has been employed as model material. The quantitative results show that the local dislocation densities vary with the depths along the incident X-ray beam in both phases and are consistently higher in the γ matrix than in the γ′ precipitates. The results from X-ray microdiffraction are in general agreement with the transmission electron microscopic observations.