Revealing the true partitioning character of zirconium in additively manufactured polycrystalline superalloys
Minor addition of zirconium is common in polycrystalline nickel-based superalloys, where it is believed that it segregates at grain boundaries and contributes to increase the creep resistance. However, in superalloys produced by additive manufacturing, zirconium may become detrimental as it promotes...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2021-12-01
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| Series: | Additive Manufacturing Letters |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772369021000116 |
| _version_ | 1818352559875686400 |
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| author | Arthur Després Stoichko Antonov Charlotte Mayer Muriel Veron Edgar F. Rauch Catherine Tassin Jean-Jacques Blandin Paraskevas Kontis Guilhem Martin |
| author_facet | Arthur Després Stoichko Antonov Charlotte Mayer Muriel Veron Edgar F. Rauch Catherine Tassin Jean-Jacques Blandin Paraskevas Kontis Guilhem Martin |
| author_sort | Arthur Després |
| collection | DOAJ |
| description | Minor addition of zirconium is common in polycrystalline nickel-based superalloys, where it is believed that it segregates at grain boundaries and contributes to increase the creep resistance. However, in superalloys produced by additive manufacturing, zirconium may become detrimental as it promotes hot-cracking during the fabrication stage. Here, we clarify the controversial role of this element by studying its distribution at near atomic scale in the as-built and heat-treated microstructures. In the as-built microstructure, zirconium is almost exclusively found at grain boundaries. However, after heat-treatment, zirconium is no longer found at grain boundaries. Instead, it partitions in γʹ precipitates and zirconium oxides particles. The formation of zirconia is shown to originate from the reduction of nano-particles of alumina by zirconium during heat-treatment. The absence of zirconium at grain boundaries in this state challenges the classic view often reported in the literature for superalloys. |
| first_indexed | 2024-12-13T18:55:34Z |
| format | Article |
| id | doaj.art-b8d0ff98face4af887ca4a10bd97f41a |
| institution | Directory Open Access Journal |
| issn | 2772-3690 |
| language | English |
| last_indexed | 2024-12-13T18:55:34Z |
| publishDate | 2021-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Additive Manufacturing Letters |
| spelling | doaj.art-b8d0ff98face4af887ca4a10bd97f41a2022-12-21T23:34:49ZengElsevierAdditive Manufacturing Letters2772-36902021-12-011100011Revealing the true partitioning character of zirconium in additively manufactured polycrystalline superalloysArthur Després0Stoichko Antonov1Charlotte Mayer2Muriel Veron3Edgar F. Rauch4Catherine Tassin5Jean-Jacques Blandin6Paraskevas Kontis7Guilhem Martin8Univ. Grenoble Alpes, CNRS, Grenoble INP, SIMaP, F-38000 Grenoble, France; Corresponding author.Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Strasse 1, Düsseldorf 40237, GermanyAubert et Duval, Usine des Ancizes, Rue des villas, BP1, Les Ancizes 63770, FranceUniv. Grenoble Alpes, CNRS, Grenoble INP, SIMaP, F-38000 Grenoble, FranceUniv. Grenoble Alpes, CNRS, Grenoble INP, SIMaP, F-38000 Grenoble, FranceUniv. Grenoble Alpes, CNRS, Grenoble INP, SIMaP, F-38000 Grenoble, FranceUniv. Grenoble Alpes, CNRS, Grenoble INP, SIMaP, F-38000 Grenoble, FranceMax-Planck-Institut für Eisenforschung GmbH, Max-Planck-Strasse 1, Düsseldorf 40237, Germany; Department of Materials Science and Engineering, NTNU Norwegian University of Science and Technology, Trondheim 7034, NorwayUniv. Grenoble Alpes, CNRS, Grenoble INP, SIMaP, F-38000 Grenoble, FranceMinor addition of zirconium is common in polycrystalline nickel-based superalloys, where it is believed that it segregates at grain boundaries and contributes to increase the creep resistance. However, in superalloys produced by additive manufacturing, zirconium may become detrimental as it promotes hot-cracking during the fabrication stage. Here, we clarify the controversial role of this element by studying its distribution at near atomic scale in the as-built and heat-treated microstructures. In the as-built microstructure, zirconium is almost exclusively found at grain boundaries. However, after heat-treatment, zirconium is no longer found at grain boundaries. Instead, it partitions in γʹ precipitates and zirconium oxides particles. The formation of zirconia is shown to originate from the reduction of nano-particles of alumina by zirconium during heat-treatment. The absence of zirconium at grain boundaries in this state challenges the classic view often reported in the literature for superalloys.http://www.sciencedirect.com/science/article/pii/S2772369021000116Additive manufacturingNickel-based superalloysPhase transformationTEMAPT |
| spellingShingle | Arthur Després Stoichko Antonov Charlotte Mayer Muriel Veron Edgar F. Rauch Catherine Tassin Jean-Jacques Blandin Paraskevas Kontis Guilhem Martin Revealing the true partitioning character of zirconium in additively manufactured polycrystalline superalloys Additive Manufacturing Letters Additive manufacturing Nickel-based superalloys Phase transformation TEM APT |
| title | Revealing the true partitioning character of zirconium in additively manufactured polycrystalline superalloys |
| title_full | Revealing the true partitioning character of zirconium in additively manufactured polycrystalline superalloys |
| title_fullStr | Revealing the true partitioning character of zirconium in additively manufactured polycrystalline superalloys |
| title_full_unstemmed | Revealing the true partitioning character of zirconium in additively manufactured polycrystalline superalloys |
| title_short | Revealing the true partitioning character of zirconium in additively manufactured polycrystalline superalloys |
| title_sort | revealing the true partitioning character of zirconium in additively manufactured polycrystalline superalloys |
| topic | Additive manufacturing Nickel-based superalloys Phase transformation TEM APT |
| url | http://www.sciencedirect.com/science/article/pii/S2772369021000116 |
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