MSE 2024
Poster
High-resolution Bragg-edge neutron radiography for visualization of grain morphology
IS

Dr.-Ing. Itziar Serrano-Munoz

Bundesanstalt für Materialforschung und -prüfung (BAM)

Serrano-Munoz, I. (Speaker)¹; Griesche, A.¹; Kardjilov, N.²; Kromm, A.¹; Markötter, H.¹; Nadammal, N.¹; Neuwirth, T.³; Pfretzschner, B.¹; Schulz, M.³
¹Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin; ²Helmholtz-Zentrum Berlin für Materialien und Energie (HZB); ³Heinz Maier-Leibnitz Zentrum (MLZ), Munich

One of the main advantages of metal additive manufacturing (MAM) techniques is their ability to produce components with site-specific microstructural features. Nevertheless, microstructural defects and lack of repeatability are still major concerns in MAM. In this study, a laser powder bed fusion (PBF-LB/M) IN718 material, produced using two different scan length vectors, is investigated using Bragg-edge neutron 2D imaging (BENI) combined with electron backscatter diffraction (EBSD) analysis. BENI is able to detect, on a macroscopic scale, process-induced changes in texture in a large field of view covering the entire sample (20×80 mm2). In addition, high-resolution BENI (HR-BENI), with a pixel size of 12.8 µm, provides a micro-scale examination of the local variations of texture and grain morphology, otherwise undistinguishable using the standard resolution. Overall, it is shown that high-resolution Bragg-edge neutron 2D imaging (HR-BENI) enables robust and concise analyses on the quality of crystallographic textures in an MAM material at cm-length scales. 

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