In Situ Three-Dimensional Orientation Mapping in Plastically-Deformed Polycrystalline Iron by Three-Dimensional X-Ray Diffraction

Abstract:

In situ three-dimensional crystallographic orientation mapping in plastically-deformed polycrystalline iron is demonstrated using a modified three-dimensional x-ray diffraction method. This voxel-by-voxel measurement method enables the observation of intragranular orientation distribution. The experiment is performed using coarse-grained ferrite with a mean grain size of ~ 60 μm and an incident x-ray beam with a beam size of 20 μm × 20 μm. Grains averagely rotate approximately toward the <110> preferred orientation of body-centered cubic uniaxial tensile texture. Intragranular orientation distributions are spread as the tensile strain increases to 10.7 %. Furthermore, intragranular multidirectional rotations are observed in grains near the <100> and <111> corners in the inverse pole figure.

• Periodical: Materials Science Forum (Volume 777)
• Pages: 118-123
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.777.118
• Online since: February 2014
• Authors: Yujiro Hayashi, Yoshiharu Hirose, Daigo Setoyama
• Keywords: Crystallographic Orientation Mapping, Intragranular Orientation Distribution, Plastic Deformation, Polycrystalline Iron, Scanning 3DXRD (S3DXRD), Three-Dimensional X-Ray Diffraction (3DXRD), Voxel-by-Voxel Measurement

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