TY - CONF A1 - Evans, Alexander A1 - Serrano-Munoz, Itziar A1 - Schröder, Jakob A1 - Mishurova, Tatiana A1 - Roveda, Ilaria A1 - Sprengel, Maximilian A1 - Fritsch, Tobias A1 - Ulbricht, Alexander A1 - Kromm, Arne A1 - Bruno, Giovanni T1 - Diffraction based residual stress analysis for laser powder bed fusion alloys N2 - Laser Powder Bed Fusion (PBF-LB/M) is a layer wise metal additive manufacturing (AM) technology, which enables significant advancements of component design, leading to potential efficiency and performance improvements. However, the thermal cycles inherent to the process comprising large localized thermal gradients and repeated melting and solidification cycles leads to the generation of high magnitude residual stresses. These residual stresses can be detrimental both during manufacturing of components and in subsequent application. Therefore, a deep understanding of the influence of process parameters on the residual stresses are crucial for efficient manufacturing and safe application. The experimental characterization of these residual stresses is therefore crucial and can provide a reliable baseline for simulations of both the process and applications. Diffraction-based methods for residual stress analysis using penetrating neutrons and high energy X-rays enable non-destructive spatially resolved characterization of both surface and bulk residual stresses. However, the unique microstructural features inherent to the process can challenge some of our assumptions when using these methods. These challenges include the determination of a stress-free reference, the use of correct elastic constants (both SCEC and DEC) and the influence of surface roughness, texture, and porosity on residual stresses. This presentation will detail recent insights and recommendations for the characterization of residual stresses in a range of PBF-LB/M metallic alloys (Fe, Ni, Al and Ti) T2 - 11th edition of the European Conference on Residual Stress (ECRS11) CY - Prague, Czech Republic DA - 03.06.2024 KW - Residual stress KW - Additive manufacturing KW - Laser Powder Bed Fusion KW - Diffraction PY - 2024 AN - OPUS4-60443 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -