Evaluation of the effects of the addition of Al, Ti, and Zr on microstructure, carburization and creep resistance of the HPNb alloy
The process of thermally cracking hydrocarbons and steam in pyrolysis furnaces to obtain ethylene is essential in the production chain of products relevant to our daily lives, such as fertilizers, polymers, pharmaceuticals, etc. The operating temperature of these furnaces is limited by the occurrenc...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424005283 |
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| author | Paulo Moura Bispo de Santana Carlos Alberto Della Rovere Elaine Christine de Magalhães Cabral Albuquerque Carlos Alberto Caldas de Souza |
| author_facet | Paulo Moura Bispo de Santana Carlos Alberto Della Rovere Elaine Christine de Magalhães Cabral Albuquerque Carlos Alberto Caldas de Souza |
| author_sort | Paulo Moura Bispo de Santana |
| collection | DOAJ |
| description | The process of thermally cracking hydrocarbons and steam in pyrolysis furnaces to obtain ethylene is essential in the production chain of products relevant to our daily lives, such as fertilizers, polymers, pharmaceuticals, etc. The operating temperature of these furnaces is limited by the occurrence of carburization and/or creep in the metallic alloy used. The objective of this work was to investigate the effect of adding Aluminum (Al) at approximately 3 wt%, Titanium (Ti) at around 0.2 wt%, and Zirconium (Zr) at about 0.2 wt% on the carburization and creep resistance of the HPNb alloy. This material is a high-performance nickel-chromium-iron (Ni–Cr–Fe) system alloy enriched with niobium (Nb). Carburization in the samples was investigated by exposure to 1150 °C for 480 h in a carburizing atmosphere. Creep was evaluated through creep-rupture tests with a constant load, performed under a tension of 17 MPa and a temperature of 1150 °C, in four metallic alloys produced by static pouring with different chemical compositions. The data obtained were analyzed using optical microscopy, SEM, EDS, and EBSD. This study’s main findings indicate that while Al enhances carburization resistance, its impact on creep resistance varies depending on exposure to carburizing conditions. The addition of Ti or Zr did not significantly alter carburization resistance but contributed to improved creep resistance under specific conditions. This study provides insights into optimizing alloy compositions for enhanced performance in high-temperature industrial applications. |
| first_indexed | 2024-04-24T22:21:38Z |
| format | Article |
| id | doaj.art-a21e6eef45d242489b97692341de2022 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T22:21:38Z |
| publishDate | 2024-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-a21e6eef45d242489b97692341de20222024-03-20T06:09:27ZengElsevierJournal of Materials Research and Technology2238-78542024-05-0130461472Evaluation of the effects of the addition of Al, Ti, and Zr on microstructure, carburization and creep resistance of the HPNb alloyPaulo Moura Bispo de Santana0Carlos Alberto Della Rovere1Elaine Christine de Magalhães Cabral Albuquerque2Carlos Alberto Caldas de Souza3Instituto Federal da Bahia, Simões Filho, BA, BrazilLaboratório de Corrosão Munir Rachid, Departamento de Engenharia de Materiais, Universidade Federal de São Carlos, São Carlos, SP, Brazil; Corresponding author.Programa de Pós-graduação em Engenharia Industrial, Universidade Federal da Bahia, Salvador, BA, BrazilDepartamento de Ciência e Tecnologia dos Materiais, Universidade Federal da Bahia, Salvador, BA, BrazilThe process of thermally cracking hydrocarbons and steam in pyrolysis furnaces to obtain ethylene is essential in the production chain of products relevant to our daily lives, such as fertilizers, polymers, pharmaceuticals, etc. The operating temperature of these furnaces is limited by the occurrence of carburization and/or creep in the metallic alloy used. The objective of this work was to investigate the effect of adding Aluminum (Al) at approximately 3 wt%, Titanium (Ti) at around 0.2 wt%, and Zirconium (Zr) at about 0.2 wt% on the carburization and creep resistance of the HPNb alloy. This material is a high-performance nickel-chromium-iron (Ni–Cr–Fe) system alloy enriched with niobium (Nb). Carburization in the samples was investigated by exposure to 1150 °C for 480 h in a carburizing atmosphere. Creep was evaluated through creep-rupture tests with a constant load, performed under a tension of 17 MPa and a temperature of 1150 °C, in four metallic alloys produced by static pouring with different chemical compositions. The data obtained were analyzed using optical microscopy, SEM, EDS, and EBSD. This study’s main findings indicate that while Al enhances carburization resistance, its impact on creep resistance varies depending on exposure to carburizing conditions. The addition of Ti or Zr did not significantly alter carburization resistance but contributed to improved creep resistance under specific conditions. This study provides insights into optimizing alloy compositions for enhanced performance in high-temperature industrial applications.http://www.sciencedirect.com/science/article/pii/S2238785424005283HPNb alloysPyrolysis furnaceMicrostructureCarburizationCreep |
| spellingShingle | Paulo Moura Bispo de Santana Carlos Alberto Della Rovere Elaine Christine de Magalhães Cabral Albuquerque Carlos Alberto Caldas de Souza Evaluation of the effects of the addition of Al, Ti, and Zr on microstructure, carburization and creep resistance of the HPNb alloy Journal of Materials Research and Technology HPNb alloys Pyrolysis furnace Microstructure Carburization Creep |
| title | Evaluation of the effects of the addition of Al, Ti, and Zr on microstructure, carburization and creep resistance of the HPNb alloy |
| title_full | Evaluation of the effects of the addition of Al, Ti, and Zr on microstructure, carburization and creep resistance of the HPNb alloy |
| title_fullStr | Evaluation of the effects of the addition of Al, Ti, and Zr on microstructure, carburization and creep resistance of the HPNb alloy |
| title_full_unstemmed | Evaluation of the effects of the addition of Al, Ti, and Zr on microstructure, carburization and creep resistance of the HPNb alloy |
| title_short | Evaluation of the effects of the addition of Al, Ti, and Zr on microstructure, carburization and creep resistance of the HPNb alloy |
| title_sort | evaluation of the effects of the addition of al ti and zr on microstructure carburization and creep resistance of the hpnb alloy |
| topic | HPNb alloys Pyrolysis furnace Microstructure Carburization Creep |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424005283 |
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