Microstructure and High Temperature Oxidation Properties of FE-CR-NI HK30 Alloy Manufactured by Metal Injection Molding
This study investigated the microstructure and high temperature oxidation properties of Fe-25Cr-20Ni-1.5Nb, HK30 alloy manufactured by metal injection molding (MIM) process. The powder used in MIM had a bi-modal size distribution of 0.11 and 9.19 μm and had a spherical shape. The initial powder cons...
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2019-06-01
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| Series: | Archives of Metallurgy and Materials |
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| Online Access: | https://journals.pan.pl/Content/111311/PDF/AMM-2019-2-14-KA%20Lee.pdf |
| _version_ | 1811220451395895296 |
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| author | Dong-Yeol Wi Young-Kyun Kim Tae-Sik Yoon Kee-Ahn Lee |
| author_facet | Dong-Yeol Wi Young-Kyun Kim Tae-Sik Yoon Kee-Ahn Lee |
| author_sort | Dong-Yeol Wi |
| collection | DOAJ |
| description | This study investigated the microstructure and high temperature oxidation properties of Fe-25Cr-20Ni-1.5Nb, HK30 alloy manufactured by metal injection molding (MIM) process. The powder used in MIM had a bi-modal size distribution of 0.11 and 9.19 μm and had a spherical shape. The initial powder consisted of γ-Fe and Cr23C6 phases. Microstructural observation of the manufactured (MIMed) HK30 alloy confirmed Cr23C6 along the grain boundary of the γ-Fe matrix, and NbC was distributed evenly on the grain boundary and in the grain. After a 24-hour high temperature oxidation test at air atmospheres of 1000, 1100 and 1200°C, the oxidation weight measured 0.72, 1.11 and 2.29 mg/cm,2 respectively. Cross-sectional observation of the oxidation specimen identified a dense Cr2O3 oxide layer at 1000°C condition, and the thickness of the oxide layer increased as the oxidation temperature increased. At 1100°C and 1200°C oxidation temperatures, Fe-rich oxide was also formed on the dense Cr2O3 oxide layer. Based on the above findings, this study identified the high-temperature oxidation mechanism of HK30 alloy manufactured by MIM. |
| first_indexed | 2024-04-12T07:42:08Z |
| format | Article |
| id | doaj.art-595d56ab9d8b44678c489105f9e2caf5 |
| institution | Directory Open Access Journal |
| issn | 2300-1909 |
| language | English |
| last_indexed | 2024-04-12T07:42:08Z |
| publishDate | 2019-06-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Metallurgy and Materials |
| spelling | doaj.art-595d56ab9d8b44678c489105f9e2caf52022-12-22T03:41:47ZengPolish Academy of SciencesArchives of Metallurgy and Materials2300-19092019-06-01vol. 64No 2525530https://doi.org/10.24425/amm.2019.127571Microstructure and High Temperature Oxidation Properties of FE-CR-NI HK30 Alloy Manufactured by Metal Injection MoldingDong-Yeol WiYoung-Kyun KimTae-Sik YoonKee-Ahn LeeThis study investigated the microstructure and high temperature oxidation properties of Fe-25Cr-20Ni-1.5Nb, HK30 alloy manufactured by metal injection molding (MIM) process. The powder used in MIM had a bi-modal size distribution of 0.11 and 9.19 μm and had a spherical shape. The initial powder consisted of γ-Fe and Cr23C6 phases. Microstructural observation of the manufactured (MIMed) HK30 alloy confirmed Cr23C6 along the grain boundary of the γ-Fe matrix, and NbC was distributed evenly on the grain boundary and in the grain. After a 24-hour high temperature oxidation test at air atmospheres of 1000, 1100 and 1200°C, the oxidation weight measured 0.72, 1.11 and 2.29 mg/cm,2 respectively. Cross-sectional observation of the oxidation specimen identified a dense Cr2O3 oxide layer at 1000°C condition, and the thickness of the oxide layer increased as the oxidation temperature increased. At 1100°C and 1200°C oxidation temperatures, Fe-rich oxide was also formed on the dense Cr2O3 oxide layer. Based on the above findings, this study identified the high-temperature oxidation mechanism of HK30 alloy manufactured by MIM.https://journals.pan.pl/Content/111311/PDF/AMM-2019-2-14-KA%20Lee.pdfmetal injection moldinghk30microstructurehigh temperature oxidation |
| spellingShingle | Dong-Yeol Wi Young-Kyun Kim Tae-Sik Yoon Kee-Ahn Lee Microstructure and High Temperature Oxidation Properties of FE-CR-NI HK30 Alloy Manufactured by Metal Injection Molding Archives of Metallurgy and Materials metal injection molding hk30 microstructure high temperature oxidation |
| title | Microstructure and High Temperature Oxidation Properties of FE-CR-NI HK30 Alloy Manufactured by Metal Injection Molding |
| title_full | Microstructure and High Temperature Oxidation Properties of FE-CR-NI HK30 Alloy Manufactured by Metal Injection Molding |
| title_fullStr | Microstructure and High Temperature Oxidation Properties of FE-CR-NI HK30 Alloy Manufactured by Metal Injection Molding |
| title_full_unstemmed | Microstructure and High Temperature Oxidation Properties of FE-CR-NI HK30 Alloy Manufactured by Metal Injection Molding |
| title_short | Microstructure and High Temperature Oxidation Properties of FE-CR-NI HK30 Alloy Manufactured by Metal Injection Molding |
| title_sort | microstructure and high temperature oxidation properties of fe cr ni hk30 alloy manufactured by metal injection molding |
| topic | metal injection molding hk30 microstructure high temperature oxidation |
| url | https://journals.pan.pl/Content/111311/PDF/AMM-2019-2-14-KA%20Lee.pdf |
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