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http://bura.brunel.ac.uk/handle/2438/27150| Title: | Effect of solution treatment on microstructure and stress rupture properties of precipitation hardened IN718 superalloy fabricated by laser powder-bed fusion process |
| Authors: | Chizari, AM Kermanpur, A Foroozmehr, E Rezaeian, A Sadeghi, F Rezaei, A |
| Keywords: | laser powder-bed fusion;IN718 superalloy;precipitation hardening;stress rupture properties;microstructure |
| Issue Date: | 17-Oct-2022 |
| Publisher: | Elsevier |
| Citation: | Chizari, A.M. et al. (2022) 'Effect of solution treatment on microstructure and stress rupture properties of precipitation hardened IN718 superalloy fabricated by laser powder-bed fusion process', Journal of Materials Research and Technology, 21 pp. 2296 - 2308. doi: 10.1016/j.jmrt.2022.10.047. |
| Abstract: | Copyright © 2022 The Author(s). Effect of solution temperature in precipitation hardening on microstructure and stress rupture properties of IN718 superalloy fabricated by laser powder-bed fusion (LPBF) process is investigated. The LPBF samples were solution treated at 980, 1060 and 1130 °C, followed by two-step aging at 720 and 620 °C, each for 8 h. The results showed that the solution treatment at 980 was not suitable for stress rupture properties due to the formation of δ and Laves phases along grain boundaries, which promoted intergranular fracture. On the other hand, non-uniform grain growth occurred in the sample solution treated at 1130 °C, which reduced stress rupture properties. The solution treatment at 1060 °C was found more suitable to improve stress rupture behavior of the LPBF IN718 superalloy at 650 °C. The rupture life of the alloy approached 87 h due to the formation of suitable grain structure and distribution of γ′/γ″ strengthening phases. |
| URI: | https://bura.brunel.ac.uk/handle/2438/27150 |
| DOI: | https://doi.org/10.1016/j.jmrt.2022.10.047 |
| ISSN: | 2238-7854 |
| Other Identifiers: | ORCID iD: Fazlollah Sadeghi https://orcid.org/0000-0002-8662-4054 |
| Appears in Collections: | Brunel Centre for Advanced Solidification Technology (BCAST) |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| FullText.pdf | Copyright © 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/). | 4.98 MB | Adobe PDF | View/Open |
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