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In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy

Oxide-dispersion-strengthened (ODS) alloys have long been considered for high temperature turbine, spacecraft, and nuclear reactor components due to their high temperature strength and radiation resistance. Conventional synthesis approaches of ODS alloys involve ball milling of powders and consolida...

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Autores principales: Lopez, Jack, Cerne, Rok, Ho, David, Madigan, Devin, Shen, Qing, Yang, Bo, Corpus, Joseph, Jarosinski, William, Wang, Haiyan, Zhang, Xinghang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10223122/
https://www.ncbi.nlm.nih.gov/pubmed/37241334
http://dx.doi.org/10.3390/ma16103707
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author Lopez, Jack
Cerne, Rok
Ho, David
Madigan, Devin
Shen, Qing
Yang, Bo
Corpus, Joseph
Jarosinski, William
Wang, Haiyan
Zhang, Xinghang
author_facet Lopez, Jack
Cerne, Rok
Ho, David
Madigan, Devin
Shen, Qing
Yang, Bo
Corpus, Joseph
Jarosinski, William
Wang, Haiyan
Zhang, Xinghang
author_sort Lopez, Jack
collection PubMed
description Oxide-dispersion-strengthened (ODS) alloys have long been considered for high temperature turbine, spacecraft, and nuclear reactor components due to their high temperature strength and radiation resistance. Conventional synthesis approaches of ODS alloys involve ball milling of powders and consolidation. In this work, a process-synergistic approach is used to introduce oxide particles during laser powder bed fusion (LPBF). Chromium (III) oxide (Cr(2)O(3)) powders are blended with a cobalt-based alloy, Mar-M 509, and exposed to laser irradiation, resulting in reduction–oxidation reactions involving metal (Ta, Ti, Zr) ions from the metal matrix to form mixed oxides of increased thermodynamic stability. A microstructure analysis indicates the formation of nanoscale spherical mixed oxide particles as well as large agglomerates with internal cracks. Chemical analyses confirm the presence of Ta, Ti, and Zr in agglomerated oxides, but primarily Zr in the nanoscale oxides. Mechanical testing reveals that agglomerate particle cracking is detrimental to tensile ductility compared to the base alloy, suggesting the need for improved processing methods to break up oxide particle clusters and promote their uniform dispersion during laser exposure.
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spelling pubmed-102231222023-05-28 In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy Lopez, Jack Cerne, Rok Ho, David Madigan, Devin Shen, Qing Yang, Bo Corpus, Joseph Jarosinski, William Wang, Haiyan Zhang, Xinghang Materials (Basel) Article Oxide-dispersion-strengthened (ODS) alloys have long been considered for high temperature turbine, spacecraft, and nuclear reactor components due to their high temperature strength and radiation resistance. Conventional synthesis approaches of ODS alloys involve ball milling of powders and consolidation. In this work, a process-synergistic approach is used to introduce oxide particles during laser powder bed fusion (LPBF). Chromium (III) oxide (Cr(2)O(3)) powders are blended with a cobalt-based alloy, Mar-M 509, and exposed to laser irradiation, resulting in reduction–oxidation reactions involving metal (Ta, Ti, Zr) ions from the metal matrix to form mixed oxides of increased thermodynamic stability. A microstructure analysis indicates the formation of nanoscale spherical mixed oxide particles as well as large agglomerates with internal cracks. Chemical analyses confirm the presence of Ta, Ti, and Zr in agglomerated oxides, but primarily Zr in the nanoscale oxides. Mechanical testing reveals that agglomerate particle cracking is detrimental to tensile ductility compared to the base alloy, suggesting the need for improved processing methods to break up oxide particle clusters and promote their uniform dispersion during laser exposure. MDPI 2023-05-13 /pmc/articles/PMC10223122/ /pubmed/37241334 http://dx.doi.org/10.3390/ma16103707 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lopez, Jack
Cerne, Rok
Ho, David
Madigan, Devin
Shen, Qing
Yang, Bo
Corpus, Joseph
Jarosinski, William
Wang, Haiyan
Zhang, Xinghang
In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy
title In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy
title_full In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy
title_fullStr In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy
title_full_unstemmed In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy
title_short In Situ Reactive Formation of Mixed Oxides in Additively Manufactured Cobalt Alloy
title_sort in situ reactive formation of mixed oxides in additively manufactured cobalt alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10223122/
https://www.ncbi.nlm.nih.gov/pubmed/37241334
http://dx.doi.org/10.3390/ma16103707
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