TY - JOUR

T1 - Microstructural characterization through grain orientation mapping with Laue three-dimensional neutron diffraction tomography

AU - Samothrakitis, Stavros

AU - Larsen, Camilla Buhl

AU - Capek, Jan

AU - Polatidis, Efthymios

AU - Raventos, Marc

AU - Tovar, Michael

AU - Schmidt, Soren

AU - Strobl, Markus

PY - 2022/8/2

Y1 - 2022/8/2

N2 - For polycrystalline materials, key material properties, such as mechanical anisotropy or transformation behavior, and magnetic properties strongly depend on the crystallographic texture of the crystalline material. Assessment of texture is generally destructive and highly local. Only high energy X-ray diffraction at synchrotron sources and neutrons enable to study, non-destructively, the microstructure in the bulk of materials. Here, we report how progress in Laue three-dimensional neutron diffraction tomography enables to index the crystallographic orientation of several hundred grains and, thus, enables grain-resolved characterization of texture in the volume of centimeter-sized coarse-grained samples with statistical significance. To demonstrate the neutron technique for characterizing the crystallographic microstructure, we investigate a Fe-Ni-Mn austenitic alloy. A total number of 481 grains within a 1 cm(3) of material is indexed and the results in assessing the crystallographic texture are compared with electron backscatter diffraction measurements. The short exposure times and non-destructive nature of the Laue three-dimensional neutron diffraction render it a novel promising method for corresponding characterization. (C) 2022 The Author(s). Published by Elsevier Ltd.

AB - For polycrystalline materials, key material properties, such as mechanical anisotropy or transformation behavior, and magnetic properties strongly depend on the crystallographic texture of the crystalline material. Assessment of texture is generally destructive and highly local. Only high energy X-ray diffraction at synchrotron sources and neutrons enable to study, non-destructively, the microstructure in the bulk of materials. Here, we report how progress in Laue three-dimensional neutron diffraction tomography enables to index the crystallographic orientation of several hundred grains and, thus, enables grain-resolved characterization of texture in the volume of centimeter-sized coarse-grained samples with statistical significance. To demonstrate the neutron technique for characterizing the crystallographic microstructure, we investigate a Fe-Ni-Mn austenitic alloy. A total number of 481 grains within a 1 cm(3) of material is indexed and the results in assessing the crystallographic texture are compared with electron backscatter diffraction measurements. The short exposure times and non-destructive nature of the Laue three-dimensional neutron diffraction render it a novel promising method for corresponding characterization. (C) 2022 The Author(s). Published by Elsevier Ltd.

KW - Laue three-dimensional neutron diffraction tomography

KW - Neutron diffractive imaging

KW - 3D grain indexing

KW - Grain orientation mapping

KW - X-RAY-DIFFRACTION

KW - IN-SITU

KW - CONTRAST TOMOGRAPHY

KW - VARIANT SELECTION

KW - TEXTURE ANALYSIS

KW - TRANSFORMATION

KW - MICROSCOPY

KW - POLYCRYSTALS

KW - STRAIN

KW - COMPATIBILITY

U2 - 10.1016/j.mtadv.2022.100258

DO - 10.1016/j.mtadv.2022.100258

M3 - Journal article

VL - 15

JO - Materials Today Advances

JF - Materials Today Advances

SN - 2590-0498

M1 - 100258

ER -