The elemental uphill diffusion with micropores reduction during HIP treatment for a solution-treated nickel-based superalloy
Micropores and elemental segregation are detrimental to the high-temperature properties of nickel-based single-crystal (SX) superalloys and hot isostatic pressing (HIP) treatment has been considered as an appropriate method to reduce micropores and elemental segregation. In this study, the effect of...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424001984 |
| _version_ | 1797247894207594496 |
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| author | Siliang He Longfei Li Song Lu Yunsong Zhao Fan Lu Jian Zhang Qiang Feng |
| author_facet | Siliang He Longfei Li Song Lu Yunsong Zhao Fan Lu Jian Zhang Qiang Feng |
| author_sort | Siliang He |
| collection | DOAJ |
| description | Micropores and elemental segregation are detrimental to the high-temperature properties of nickel-based single-crystal (SX) superalloys and hot isostatic pressing (HIP) treatment has been considered as an appropriate method to reduce micropores and elemental segregation. In this study, the effect of a two-step HIP treatment on the solution-treated nickel-based SX superalloy was investigated. An elemental uphill diffusion with the micropores reduction was discovered during HIP treatment and caused the elemental segregation of Al, Cr and Ta at the dendritic scale. It indicates that the HIP treatment is not always beneficial for alloy homogenization. The results show that the first-step HIP treatment could promote the uphill diffusion and cause the elemental segregation with the significant micropores reduction. The second-step HIP treatment could decrease the elemental segregation with further micropores reduction. During subsequent heat treatments, the elemental segregation caused by HIP treatment could be basically eliminated with a slight increase of micropores. During HIP treatment, the micropores reduction and elemental segregation were correlated with the HIP temperature and pressure. This study will provide the supports for controlling micropores and homogenization of nickel-based SX superalloys. |
| first_indexed | 2024-03-08T06:56:15Z |
| format | Article |
| id | doaj.art-b3e1f6758ee84f229cc544eaa5467301 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:05:56Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-b3e1f6758ee84f229cc544eaa54673012024-03-24T06:57:35ZengElsevierJournal of Materials Research and Technology2238-78542024-03-012918621871The elemental uphill diffusion with micropores reduction during HIP treatment for a solution-treated nickel-based superalloySiliang He0Longfei Li1Song Lu2Yunsong Zhao3Fan Lu4Jian Zhang5Qiang Feng6Beijing Advanced Innovation Center for Materials Genome Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, ChinaBeijing Advanced Innovation Center for Materials Genome Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author.Beijing Advanced Innovation Center for Materials Genome Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, ChinaKey Laboratory of Advanced High Temperature Structural Materials, AECC Beijing Institute of Aeronautical Materials, Beijing, 100095, ChinaBeijing Advanced Innovation Center for Materials Genome Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, ChinaKey Laboratory of Advanced High Temperature Structural Materials, AECC Beijing Institute of Aeronautical Materials, Beijing, 100095, ChinaBeijing Advanced Innovation Center for Materials Genome Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author.Micropores and elemental segregation are detrimental to the high-temperature properties of nickel-based single-crystal (SX) superalloys and hot isostatic pressing (HIP) treatment has been considered as an appropriate method to reduce micropores and elemental segregation. In this study, the effect of a two-step HIP treatment on the solution-treated nickel-based SX superalloy was investigated. An elemental uphill diffusion with the micropores reduction was discovered during HIP treatment and caused the elemental segregation of Al, Cr and Ta at the dendritic scale. It indicates that the HIP treatment is not always beneficial for alloy homogenization. The results show that the first-step HIP treatment could promote the uphill diffusion and cause the elemental segregation with the significant micropores reduction. The second-step HIP treatment could decrease the elemental segregation with further micropores reduction. During subsequent heat treatments, the elemental segregation caused by HIP treatment could be basically eliminated with a slight increase of micropores. During HIP treatment, the micropores reduction and elemental segregation were correlated with the HIP temperature and pressure. This study will provide the supports for controlling micropores and homogenization of nickel-based SX superalloys.http://www.sciencedirect.com/science/article/pii/S2238785424001984Nickel-based single-crystal superalloyHot isostatic pressingElemental uphill diffusionMicropores reductionHomogenization |
| spellingShingle | Siliang He Longfei Li Song Lu Yunsong Zhao Fan Lu Jian Zhang Qiang Feng The elemental uphill diffusion with micropores reduction during HIP treatment for a solution-treated nickel-based superalloy Journal of Materials Research and Technology Nickel-based single-crystal superalloy Hot isostatic pressing Elemental uphill diffusion Micropores reduction Homogenization |
| title | The elemental uphill diffusion with micropores reduction during HIP treatment for a solution-treated nickel-based superalloy |
| title_full | The elemental uphill diffusion with micropores reduction during HIP treatment for a solution-treated nickel-based superalloy |
| title_fullStr | The elemental uphill diffusion with micropores reduction during HIP treatment for a solution-treated nickel-based superalloy |
| title_full_unstemmed | The elemental uphill diffusion with micropores reduction during HIP treatment for a solution-treated nickel-based superalloy |
| title_short | The elemental uphill diffusion with micropores reduction during HIP treatment for a solution-treated nickel-based superalloy |
| title_sort | elemental uphill diffusion with micropores reduction during hip treatment for a solution treated nickel based superalloy |
| topic | Nickel-based single-crystal superalloy Hot isostatic pressing Elemental uphill diffusion Micropores reduction Homogenization |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424001984 |
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