- The control of residual stress (RS) remains a challenge in the manufacturing of metallic parts using the laser powder bed fusion process (LPBF). This layer-by-layer manufacturing approach gives rise to complex triaxial RS distributions, which require extensive characterization effort for a broader acceptance of LPBF in industry. This study focuses on the distribution of bulk triaxial RS and surface RS in LPBF austenitic steel 316L. The RS are determined by X-ray and neutron diffraction to characterize the RS distribution. Variations in the LPBF parameters interlayer time (ILT) and scanning velocity and their influence on the temperature distribution and resulting RS is investigated using thermographic data from in situ process monitoring. The RS in the LPBF 316L is tensile at the surface and compressive in the bulk. The RS is directly related to the thermal history of the part as shown by the in situ thermography data. Shorter ILT leads to higher temperatures of the part during the manufacturing, which decrease the RS and RS formationThe control of residual stress (RS) remains a challenge in the manufacturing of metallic parts using the laser powder bed fusion process (LPBF). This layer-by-layer manufacturing approach gives rise to complex triaxial RS distributions, which require extensive characterization effort for a broader acceptance of LPBF in industry. This study focuses on the distribution of bulk triaxial RS and surface RS in LPBF austenitic steel 316L. The RS are determined by X-ray and neutron diffraction to characterize the RS distribution. Variations in the LPBF parameters interlayer time (ILT) and scanning velocity and their influence on the temperature distribution and resulting RS is investigated using thermographic data from in situ process monitoring. The RS in the LPBF 316L is tensile at the surface and compressive in the bulk. The RS is directly related to the thermal history of the part as shown by the in situ thermography data. Shorter ILT leads to higher temperatures of the part during the manufacturing, which decrease the RS and RS formation mechanisms. Interestingly, the surface RS does not agree with this observation. This study highlights the benefit of using multiple RS determination methods and in situ thermography monitoring to characterize the RS in LPBF processed parts.…
MetadatenAuthor details: | Maximilian SprengelORCiDGND, Gunther Mohr, Simon J. AltenburgORCiD, Alexander Evans, Itziar Serrano-MunozORCiD, Arne KrommORCiDGND, Thilo PirlingORCiD, Giovanni BrunoORCiDGND, Thomas KannengießerORCiDGND |
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DOI: | https://doi.org/10.1002/adem.202101330 |
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ISSN: | 1438-1656 |
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ISSN: | 1527-2648 |
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Title of parent work (English): | Advanced engineering materials |
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Subtitle (English): | effects of interlayer time and scanning velocity |
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Publisher: | Wiley-VCH |
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Place of publishing: | Weinheim |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2021/12/09 |
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Publication year: | 2021 |
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Release date: | 2024/04/29 |
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Tag: | X-ray and neutron diffractions; in situ thermography; interlayer time; laser powder bed fusions; triaxial residual stresses |
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Volume: | 24 |
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Issue: | 6 |
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Article number: | 2101330 |
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Number of pages: | 13 |
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Funding institution: | BAM Focus Area Materials project AGIL "Microstructure Development in; Additively Manufactured Metallic Components: from Powder to Mechanical; Failure"; ProMoAM " Process monitoring of Additive Manufacturing";; 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 / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
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| 6 Technik, Medizin, angewandte Wissenschaften / 66 Chemische Verfahrenstechnik / 660 Chemische Verfahrenstechnik |
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Peer review: | Referiert |
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Publishing method: | Open Access / Hybrid Open-Access |
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License (German): | CC-BY - Namensnennung 4.0 International |
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