The DOI matches its Crossref record; 93 of the 98 references it cites were found in a registry or an index.
Influence of thermal post treatments on microstructure and oxidation behavior of EB-PBF manufactured Alloy 718
Abstract
Abstract The effect of thermal post treatments consisting of heat treatment (HT), hot isostatic pressing (HIP), and combined HIP-HT on microstructure and oxidation behavior of Alloy 718 manufactured by electron beam powder bed fusion (EB-PBF) technique was investigated. Oxidation of the as-built and post-treated specimens was performed in ambient air at 650, 750, and 850 °C for up to 168 h. Directional columnar-grained microstructure, pores and fine Nb-rich carbides were observed in the as-built specimen. The HT specimen presented the columnar microstructure, plate-like δ phase at grain boundaries, and pores. The dominant grain crystallographic orientation was changed from 〈001〉 in the as-built specimen to 〈101〉 after HT. No grain boundary δ phase was observed in the HIPed specimen, but recrystallization occurred in both the HIP and HIP-HT specimens due to a rapid cooling after HIPing motivating the nucleation of fine grains with limited time to grow. After oxidation exposure at 650 and 750 °C for 168 h, no big difference between weight changes of the as-built and post-treated specimens was noted, whereas at 850 °C, the combined HIP-HT specimen showed the most promising corrosion resistance with the least weight change. At 850 °C, a protective scale of Cr2O3 rich in Cr, Ti, and Ni as well as an internal oxide (branched structure of alumina) developed in all the specimens, while, only a protective Cr2O3 scale was found at 650 and 750 °C. The HIP-HT specimen at 850 °C developed an oxide scale, which was denser and more adherent in comparison to the oxide scales formed on the other three specimens, associated with its limited defect distribution and more homogenized microstructure. Moreover, the δ phase formed close to the surface of the exposed specimens during the oxidation exposure at 850 °C most probably led to nucleation and growth of the oxide scale.
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“EB-PBF operates in a vacuum [145], which is particularly well-suited for applications in space environments.”
From A comprehensive review of lunar-based manufacturing and construction (2024) · cites this paper as [145]
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“The use of an electron beam source for in-space manufacturing will be limited to additive manufacturing of metals, with wire or powder feedstock [145,146,307].”
From A comprehensive review of lunar-based manufacturing and construction (2024) · cites this paper as [145]
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Haines, M. P., Rielli, V. V., Primig, S., & Haghdadi, N. (2022) · Journal of Materials Science · doi:10.1007/s10853-022-07501-4 · Cited by 122
Metadata
- Authors
- Sadeghi, E., Karimi, P., Momeni, S., Seifi, M., Eklund, A., & Andersson, J.
- Affiliations
- University West (SE)
- Friedrich-Alexander-Universität Erlangen-Nürnberg (DE)
- American Society For Testing and Materials (US)
- Quintus Technologies (Sweden) (SE)
- Corresponding author
- Sadeghi, Esmaeil
- Venue
- Materials Characterization
- Publisher
- Elsevier BV
- Published
- 2019-04
- Volume
- 150
- Pages
- 236-251
- ISSN
- 1044-5803 (ISSN-L)
- OpenAlex
- W2913634436
- Cited by
- 74
- References
- 98
- Citations by year
- 2026: 21 · 2025: 12 · 2024: 12 · 2023: 4 · 2022: 11 · 2021: 2 · 2020: 9 · 2019: 3
- FWCI
- 3.52
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.elsevier.com/tdm/userlicense/1.0/ (tdm)
- Locations
- Materials Characterization (publishedVersion)
- Funders
- Knowledge Foundation
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Additive Manufacturing Materials and Processes
- Physical Sciences › Engineering › Mechanical Engineering › High Temperature Alloys and Creep
- Physical Sciences › Materials Science › Surfaces, Coatings and Films › High-Temperature Coating Behaviors
- Keywords
- Inconel 718, electron beam melting, post-heat treatment, hot isostatic pressing, heat treatment, oxidation behavior, high-temperature corrosion, microstructure, columnar grains, delta phase, recrystallization, grain orientation, oxide scale, Cr2O3 scale, alumina, protective scale, additive manufacturing
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- The paper
- Sadeghi, E., Karimi, P., Momeni, S., Seifi, M., Eklund, A., & Andersson, J. (2019). Influence of thermal post treatments on microstructure and oxidation behavior of EB-PBF manufactured Alloy 718. Materials Characterization. https://doi.org/10.1016/j.matchar.2019.02.016
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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