PSI - Issue 77

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ScienceDirect

Procedia Structural Integrity 77 (2026) 237–247 Structural Integrity Procedia 00 (2026) 000–000 Structural Integrity Procedia 00 (2026) 000–000

www.elsevier.com / locate / procedia www.elsevier.com / locate / procedia

© 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSI organizers The results highlight that build strategies significantly influence thermal histories, residual stress, and fatigue performance, beyond what can be achieved by parameter optimization alone. While no strategy-specific parameter optimization was performed, the findings point toward the potential of tailored scan strategies to improve reliability and reproducibility in PBF-LB / M. Future work will focus on quantitative thermography, microstructural analysis, and refined Voronoi implementations for local property control. © 2026 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of ICSI organizers. Keywords: SLM; LPBF; Scan Strategy; Buildprocessor; Voronoi; Slicer The scan strategies were applied to demonstrator parts, cantilever specimens, and fatigue specimens, produced from 316L stain less steel and the alloy Specialis ® ondi ff erent PBF-LB / M machines. Thermographic snapshots revealed pronounced heat accumu lation in linear hatching, whereas the Voronoi strategy achieved more homogeneous exposure. Cantilever tests showed that Index Reorder and Pilger reduced residual stresses compared to the reference (measured by deflection). Fatigue testing demonstrated that all novel strategies substantially reduced life scatter relative to the linear baseline, with Voronoi showing a slight additional improvement. The results highlight that build strategies significantly influence thermal histories, residual stress, and fatigue performance, beyond what can be achieved by parameter optimization alone. While no strategy-specific parameter optimization was performed, the findings point toward the potential of tailored scan strategies to improve reliability and reproducibility in PBF-LB / M. Future work will focus on quantitative thermography, microstructural analysis, and refined Voronoi implementations for local property control. © 2026 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of ICSI organizers. Keywords: SLM; LPBF; Scan Strategy; Buildprocessor; Voronoi; Slicer International Conference on Structural Integrity Optimization and Development of scanning strategies in PBF-LB / M - Influencing mechanical properties of additive manufactured parts Roman Hofmann a, ∗ , Moritz Ka¨ß a , Martin Werz a , Stefan Weihe a a Materials Testing Institute, Pfa ff enwaldring 32, Stuttgart 70569, Germany Abstract Laser Powder Bed Fusion (LPBF) or Laser Powder Bed Fusion of Metals (PBF-LB / M) enables the production of complex ge ometries. However, not every production process is successful and the outcome of the material properties is sometimes uncertain. Conventional build strategies are often limited to parameter tuning and minor scan-path variations, leaving much of the process freedom unused. Thus the full potential of the method has not yet been fully exploited. In this work, the development of new scan strategies implemented in a custom Python-based slicer with full vector-level control are described and evaluated. Four approaches were investigated: Index Reorder, Time Reorder, Voronoi partitioning, and Pilger (back-step–inspired segmentation). The scan strategies were applied to demonstrator parts, cantilever specimens, and fatigue specimens, produced from 316L stain less steel and the alloy Specialis ® ondi ff erent PBF-LB / M machines. Thermographic snapshots revealed pronounced heat accumu lation in linear hatching, whereas the Voronoi strategy achieved more homogeneous exposure. Cantilever tests showed that Index Reorder and Pilger reduced residual stresses compared to the reference (measured by deflection). Fatigue testing demonstrated that all novel strategies substantially reduced life scatter relative to the linear baseline, with Voronoi showing a slight additional improvement. International Conference on Structural Integrity Optimization and Development of scanning strategies in PBF-LB / - Influencing mechanical properties of additive manufactured parts Roman Hofmann a, ∗ , Moritz Ka¨ß a , Martin Werz a , Stefan Weihe a a Materials Testing Institute, Pfa ff enwaldring 32, Stuttgart 70569, Germany Abstract Laser Powder Bed Fusion (LPBF) or Laser Powder Bed Fusion of Metals (PBF-LB / M) enables the production of complex ge ometries. However, not every production process is successful and the outcome of the material properties is sometimes uncertain. Conventional build strategies are often limited to parameter tuning and minor scan-path variations, leaving much of the process freedom unused. Thus the full potential of the method has not yet been fully exploited. In this work, the development of new scan strategies implemented in a custom Python-based slicer with full vector-level control are described and evaluated. Four approaches were investigated: Index Reorder, Time Reorder, Voronoi partitioning, and Pilger (back-step–inspired segmentation).

∗ Corresponding author. Tel.: + 49-711-685-62549. E-mail address: roman.hofmann@mpa.uni-stuttgart.de ∗ Corresponding author. Tel.: + 49-711-685-62549. E-mail address: roman.hofmann@mpa.uni-stuttgart.de

2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSI organizers 10.1016/j.prostr.2026.01.032 2210-7843 © 2026 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of ICSI organizers. 2210-7843 © 2026 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of ICSI organizers.