Very High Cycle Fatigue Investigations on the Fatigue Strength of Additive Manufactured and Conventionally Wrought Inconel 718 at 873 K

The fatigue lives of additively manufactured (AM) Inconel 718 (IN718) produced by selective electron beam melting and conventional wrought material as reference conditions were studied in the very high cycle fatigue regime under fully reversed loading (R = −1) at the elevated temperature of 873 K us...

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Autores principales:	Alexander Schmiedel, Christina Burkhardt, Sebastian Henkel, Anja Weidner, Horst Biermann
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	additive manufacturing nickel-base superalloy high-temperature materials very high cycle fatigue crack growth Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/448ad9d6cd5844a1aeefc14e9022ee54
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id	oai:doaj.org-article:448ad9d6cd5844a1aeefc14e9022ee54
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spelling	oai:doaj.org-article:448ad9d6cd5844a1aeefc14e9022ee542021-11-25T18:21:10ZVery High Cycle Fatigue Investigations on the Fatigue Strength of Additive Manufactured and Conventionally Wrought Inconel 718 at 873 K10.3390/met111116822075-4701https://doaj.org/article/448ad9d6cd5844a1aeefc14e9022ee542021-10-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1682https://doaj.org/toc/2075-4701The fatigue lives of additively manufactured (AM) Inconel 718 (IN718) produced by selective electron beam melting and conventional wrought material as reference conditions were studied in the very high cycle fatigue regime under fully reversed loading (R = −1) at the elevated temperature of 873 K using an ultrasonic fatigue testing system. The fatigue lives of the AM material were significantly reduced compared to the wrought material, which is discussed in relation to the microstructure and a fractographical analysis. The additively manufactured material showed large columnar grains with a favoured orientation to the building direction and porosity, whereas the wrought material showed a fine-grained structure with no significant texture, but had Nb- and Ti-rich non-metallic inclusions. Crystallographic crack initiation as well as crack initiation from the surface or internal defects were observed for the AM and the wrought IN718, respectively.Alexander SchmiedelChristina BurkhardtSebastian HenkelAnja WeidnerHorst BiermannMDPI AGarticleadditive manufacturingnickel-base superalloyhigh-temperature materialsvery high cycle fatiguecrack growthMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1682, p 1682 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	additive manufacturing nickel-base superalloy high-temperature materials very high cycle fatigue crack growth Mining engineering. Metallurgy TN1-997
spellingShingle	additive manufacturing nickel-base superalloy high-temperature materials very high cycle fatigue crack growth Mining engineering. Metallurgy TN1-997 Alexander Schmiedel Christina Burkhardt Sebastian Henkel Anja Weidner Horst Biermann Very High Cycle Fatigue Investigations on the Fatigue Strength of Additive Manufactured and Conventionally Wrought Inconel 718 at 873 K
description	The fatigue lives of additively manufactured (AM) Inconel 718 (IN718) produced by selective electron beam melting and conventional wrought material as reference conditions were studied in the very high cycle fatigue regime under fully reversed loading (R = −1) at the elevated temperature of 873 K using an ultrasonic fatigue testing system. The fatigue lives of the AM material were significantly reduced compared to the wrought material, which is discussed in relation to the microstructure and a fractographical analysis. The additively manufactured material showed large columnar grains with a favoured orientation to the building direction and porosity, whereas the wrought material showed a fine-grained structure with no significant texture, but had Nb- and Ti-rich non-metallic inclusions. Crystallographic crack initiation as well as crack initiation from the surface or internal defects were observed for the AM and the wrought IN718, respectively.
format	article
author	Alexander Schmiedel Christina Burkhardt Sebastian Henkel Anja Weidner Horst Biermann
author_facet	Alexander Schmiedel Christina Burkhardt Sebastian Henkel Anja Weidner Horst Biermann
author_sort	Alexander Schmiedel
title	Very High Cycle Fatigue Investigations on the Fatigue Strength of Additive Manufactured and Conventionally Wrought Inconel 718 at 873 K
title_short	Very High Cycle Fatigue Investigations on the Fatigue Strength of Additive Manufactured and Conventionally Wrought Inconel 718 at 873 K
title_full	Very High Cycle Fatigue Investigations on the Fatigue Strength of Additive Manufactured and Conventionally Wrought Inconel 718 at 873 K
title_fullStr	Very High Cycle Fatigue Investigations on the Fatigue Strength of Additive Manufactured and Conventionally Wrought Inconel 718 at 873 K
title_full_unstemmed	Very High Cycle Fatigue Investigations on the Fatigue Strength of Additive Manufactured and Conventionally Wrought Inconel 718 at 873 K
title_sort	very high cycle fatigue investigations on the fatigue strength of additive manufactured and conventionally wrought inconel 718 at 873 k
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/448ad9d6cd5844a1aeefc14e9022ee54
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Very High Cycle Fatigue Investigations on the Fatigue Strength of Additive Manufactured and Conventionally Wrought Inconel 718 at 873 K

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