- As opposed to reviewing results on experimental determination of residual stress by diffraction, this paper discusses the open issues when dealing with residual stress determination in additive manufactured parts, in particular those manufactured with laser powder bed fusion techniques. Three points are addressed in detail: (a) the proper determination of the strain-free reference d0, (b) the problem of the determination of the principal axes, and (c) the use of the correct diffraction elastic constants. It is shown that all methods to determine the strain-free reference d0 suffer from caveats, and care must be taken in evaluating the most suitable for the problem being tackled. In addition, it is shown that, in some systems, the principal axes do correspond to the geometrical axes of the specimen, but this needs to be systematically checked, especially in the case of uni- or bidirectional hatching strategies. Finally, the need to experimentally determine the proper diffraction elasticAs opposed to reviewing results on experimental determination of residual stress by diffraction, this paper discusses the open issues when dealing with residual stress determination in additive manufactured parts, in particular those manufactured with laser powder bed fusion techniques. Three points are addressed in detail: (a) the proper determination of the strain-free reference d0, (b) the problem of the determination of the principal axes, and (c) the use of the correct diffraction elastic constants. It is shown that all methods to determine the strain-free reference d0 suffer from caveats, and care must be taken in evaluating the most suitable for the problem being tackled. In addition, it is shown that, in some systems, the principal axes do correspond to the geometrical axes of the specimen, but this needs to be systematically checked, especially in the case of uni- or bidirectional hatching strategies. Finally, the need to experimentally determine the proper diffraction elastic constants is underlined, especially in the case of strongly textured specimens, which again depends on the deposition strategy.…
MetadatenAutor*innen: | Giovanni BrunoORCiD, Tatiana MishurovaORCiD, Itziar Serrano MunozORCiD, Alexander Ulbricht, Tobias FritschORCiD, Maximilian SprengelORCiD, Alexander Evans, Arne KrommORCiD, Mauro Madia |
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Persönliche Herausgeber*innen: | Giovanni BrunoORCiD |
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Dokumenttyp: | Beitrag zu einem Tagungsband |
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Veröffentlichungsform: | Eigenverlag BAM |
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Sprache: | Englisch |
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Titel des übergeordneten Werkes (Englisch): | Structural integrityofadditive manufactured materials and parts |
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Jahr der Erstveröffentlichung: | 2020 |
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Organisationseinheit der BAM: | 8 Zerstörungsfreie Prüfung |
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| 8 Zerstörungsfreie Prüfung / 8.5 Röntgenbildgebung |
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| 9 Komponentensicherheit |
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| 9 Komponentensicherheit / 9.4 Integrität von Schweißverbindungen |
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Verlag: | ASTM International |
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Verlagsort: | USA |
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Jahrgang/Band: | STP1631 |
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Erste Seite: | 122 |
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Letzte Seite: | 138 |
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DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten |
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Freie Schlagwörter: | Additive Manufacturing; Diffraction; Residual Stress |
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Themenfelder/Aktivitätsfelder der BAM: | Material |
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| Material / Additive Fertigung |
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| Material / Degradation von Werkstoffen |
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Veranstaltung: | ASTM ICAM 2020 – ASTM International Conference on Additive Manufacturing |
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Veranstaltungsort: | Online meeting |
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Beginndatum der Veranstaltung: | 16.11.2020 |
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Enddatum der Veranstaltung: | 20.11.2020 |
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DOI: | 10.1520/STP163120190148 |
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Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
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Datum der Freischaltung: | 30.09.2020 |
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Referierte Publikation: | Nein |
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