Datum
2021-07-29Schlagwort
620 Ingenieurwissenschaften Rapid Prototyping <Fertigung>Inconel 718Selektives LaserschmelzenEigenspannungSynchrotronstrahlungMetadata
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Artikel (Publikationen im Open Access gefördert durch die UB)
A Novel Approach to Robustly Determine Residual Stress in Additively Manufactured Microstructures Using Synchrotron Radiation
Zusammenfassung
In recent decades additive manufacturing (AM) for years has been in focus of academia and industry as its underlying production principle allows for the realization of designs of unprecedented geometrical complexity. However, often such structures are not realized due to the lack of understanding of structural and mechanical properties, this fact amongst others related to the unique microstructures established by the related processes. In this context, residual stresses, highly affected by the scan strategy and process parameters used, play an essential role. Generally, various methods and approaches can be used to determine residual stress states experimentally. However, especially in case of the unique microstructures formed by AM, most standard procedures cannot be applied reliably. Commonly used methods based on X-ray diffraction rely on laboratory X-ray sources and synchrotron radiation. In present work, a novel method is proposed for robustly calculating residual stresses based on the linear regression method (similar to the sin2 ψ approach in reflection mode). Data obtained by use of synchrotron radiation in transmission mode are applied. To assess the reliability of the novel procedure, results are validated using simulations and in situ tensile tests. For these tests the well-known Ni-base alloy INCONEL 718 processed by laser powder bed fusion (LPBF), being characterized by a complex microstructure, and a conventionally manufactured 100Cr6 steel sample are used.
Zitierform
In: Advanced Engineering Materials Volume 23 / Issue 11 (2021-07-29) eissn:1527-2648Förderhinweis
Gefördert im Rahmen des Projekts DEALSammlung(en)
Publikationen (Fachgebiet Metallische Werkstoffe)Artikel (Publikationen im Open Access gefördert durch die UB)
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@article{doi:10.17170/kobra-202112095211,
author={Aminforoughi, Behzad and Degener, Sebastian and Richter, Julia and Liehr, Alexander and Niendorf, Thomas},
title={A Novel Approach to Robustly Determine Residual Stress in Additively Manufactured Microstructures Using Synchrotron Radiation},
journal={Advanced Engineering Materials},
year={2021}
}
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2022-01-31T14:42:48Z 2022-01-31T14:42:48Z 2021-07-29 doi:10.17170/kobra-202112095211 http://hdl.handle.net/123456789/13579 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ additive manufacturing INCONEL 718 laser powder bed fusion residual stress synchrotron measurements 620 A Novel Approach to Robustly Determine Residual Stress in Additively Manufactured Microstructures Using Synchrotron Radiation Aufsatz In recent decades additive manufacturing (AM) for years has been in focus of academia and industry as its underlying production principle allows for the realization of designs of unprecedented geometrical complexity. However, often such structures are not realized due to the lack of understanding of structural and mechanical properties, this fact amongst others related to the unique microstructures established by the related processes. In this context, residual stresses, highly affected by the scan strategy and process parameters used, play an essential role. Generally, various methods and approaches can be used to determine residual stress states experimentally. However, especially in case of the unique microstructures formed by AM, most standard procedures cannot be applied reliably. Commonly used methods based on X-ray diffraction rely on laboratory X-ray sources and synchrotron radiation. In present work, a novel method is proposed for robustly calculating residual stresses based on the linear regression method (similar to the sin2 ψ approach in reflection mode). Data obtained by use of synchrotron radiation in transmission mode are applied. To assess the reliability of the novel procedure, results are validated using simulations and in situ tensile tests. For these tests the well-known Ni-base alloy INCONEL 718 processed by laser powder bed fusion (LPBF), being characterized by a complex microstructure, and a conventionally manufactured 100Cr6 steel sample are used. open access Aminforoughi, Behzad Degener, Sebastian Richter, Julia Liehr, Alexander Niendorf, Thomas doi:10.1002/adem.202100184 Grant Number: 346979276 Rapid Prototyping <Fertigung> Inconel 718 Selektives Laserschmelzen Eigenspannung Synchrotronstrahlung publishedVersion eissn:1527-2648 Issue 11 Advanced Engineering Materials Volume 23 false 2100184
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