- The effect of two types of scanning strategies on the grain structure and build-up of Residual Stress (RS) has been investigated in an as-built IN718 alloy produced by Laser Powder Bed Fusion (LPBF). The RS state has been investigated by X-ray diffraction techniques. The microstructural characterization was performed principally by Electron Backscatter Diffraction (EBSD), where the application of a post-measurement refinement technique enables small misorientations (< 2 degrees) to be resolved. Kernel average misorientation (KAM) distributions indicate that preferably oriented columnar grains contain higher levels of misorientation, when compared to elongated grains with lower texture. The KAM distributions combined with X-ray diffraction stress maps infer that the increased misorientation is induced via plastic deformation driven by the thermal stresses, acting to self-relieve stress. The possibility of obtaining lower RS states in the build direction as a consequence of the influence of the microstructure should be considered whenThe effect of two types of scanning strategies on the grain structure and build-up of Residual Stress (RS) has been investigated in an as-built IN718 alloy produced by Laser Powder Bed Fusion (LPBF). The RS state has been investigated by X-ray diffraction techniques. The microstructural characterization was performed principally by Electron Backscatter Diffraction (EBSD), where the application of a post-measurement refinement technique enables small misorientations (< 2 degrees) to be resolved. Kernel average misorientation (KAM) distributions indicate that preferably oriented columnar grains contain higher levels of misorientation, when compared to elongated grains with lower texture. The KAM distributions combined with X-ray diffraction stress maps infer that the increased misorientation is induced via plastic deformation driven by the thermal stresses, acting to self-relieve stress. The possibility of obtaining lower RS states in the build direction as a consequence of the influence of the microstructure should be considered when envisaging scanning strategies aimed at the mitigation of RS.…
MetadatenAuthor details: | Itziar Serrano-MunozORCiD, Tatiana MishurovaORCiDGND, Tobias ThiedeORCiDGND, Maximilian SprengelORCiD, Arne KrommORCiDGND, Naresh Nadammal, Gert Nolze, Romeo Saliwan-Neumann, Alexander EvansORCiD, Giovanni BrunoORCiDGND |
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DOI: | https://doi.org/10.1038/s41598-020-71112-9 |
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ISSN: | 2045-2322 |
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Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/32887914 |
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Title of parent work (English): | Scientific reports |
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Publisher: | Macmillan Publishers Limited, part of Springer Nature |
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Place of publishing: | London |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2020/09/04 |
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Publication year: | 2020 |
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Release date: | 2023/03/24 |
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Tag: | EBSD; components; deposition; diffraction; distortion; heat-treatment; mechanical properties; melting slm; superalloys; texture |
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Volume: | 10 |
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Issue: | 1 |
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Article number: | 14645 |
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Number of pages: | 15 |
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Funding institution: | Projekt DEAL |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 50 Naturwissenschaften / 500 Naturwissenschaften und Mathematik |
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| 6 Technik, Medizin, angewandte Wissenschaften / 60 Technik / 600 Technik, Technologie |
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Peer review: | Referiert |
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Publishing method: | Open Access / Gold Open-Access |
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License (German): | CC-BY - Namensnennung 4.0 International |
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