Exploring the Influence of Nanocrystalline Structure and Aluminum Content on High-Temperature Oxidation Behavior of Fe-Cr-Al Alloys
The present study examines the high-temperature (500–800 °C) oxidation behavior of Fe-10Cr-(3,5) Al alloys and studies the effect of nanocrystalline structure and Al content on their resistance to oxidation. The nanocrystalline (NC) alloy powder was synthesized via planetary ball milling. The prepar...
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MDPI AG
2024-04-01
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| Online Access: | https://www.mdpi.com/1996-1944/17/7/1700 |
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| author | Rajiv Kumar R. K. Singh Raman S. R. Bakshi V. S. Raja S. Parida |
| author_facet | Rajiv Kumar R. K. Singh Raman S. R. Bakshi V. S. Raja S. Parida |
| author_sort | Rajiv Kumar |
| collection | DOAJ |
| description | The present study examines the high-temperature (500–800 °C) oxidation behavior of Fe-10Cr-(3,5) Al alloys and studies the effect of nanocrystalline structure and Al content on their resistance to oxidation. The nanocrystalline (NC) alloy powder was synthesized via planetary ball milling. The prepared NC alloy powder was consolidated using spark plasma sintering to form NC alloys. Subsequently, an annealing of the NC alloys was performed to transform them into microcrystalline (MC) alloys. It was observed that the NC alloys exhibit superior resistance to oxidation compared to their MC counterparts at high temperatures. The superior resistance to oxidation of the NC alloys is attributed to their considerably finer grain size, which enhances the diffusion of those elements to the metal–oxide interface that forms the protective oxide layer. Conversely, the coarser grain size in MC alloys limits the diffusion of the oxide-forming components. Furthermore, the Fe-10Cr-5Al alloy showed greater resistance to oxidation than the Fe-10Cr-3Al alloy. |
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| format | Article |
| id | doaj.art-8e9a939c78564778b7022ac43b4378e0 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-24T10:40:18Z |
| publishDate | 2024-04-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-8e9a939c78564778b7022ac43b4378e02024-04-12T13:22:22ZengMDPI AGMaterials1996-19442024-04-01177170010.3390/ma17071700Exploring the Influence of Nanocrystalline Structure and Aluminum Content on High-Temperature Oxidation Behavior of Fe-Cr-Al AlloysRajiv Kumar0R. K. Singh Raman1S. R. Bakshi2V. S. Raja3S. Parida4Department of Metallurgical and Materials Engineering, Indian Institute of Technology Ropar, Bara Phool 140001, IndiaDepartment of Mechanical and Aerospace Engineering, Monash University, Clayton, VIC 3800, AustraliaDepartment of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, IndiaDepartment of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai 400076, IndiaDepartment of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai 400076, IndiaThe present study examines the high-temperature (500–800 °C) oxidation behavior of Fe-10Cr-(3,5) Al alloys and studies the effect of nanocrystalline structure and Al content on their resistance to oxidation. The nanocrystalline (NC) alloy powder was synthesized via planetary ball milling. The prepared NC alloy powder was consolidated using spark plasma sintering to form NC alloys. Subsequently, an annealing of the NC alloys was performed to transform them into microcrystalline (MC) alloys. It was observed that the NC alloys exhibit superior resistance to oxidation compared to their MC counterparts at high temperatures. The superior resistance to oxidation of the NC alloys is attributed to their considerably finer grain size, which enhances the diffusion of those elements to the metal–oxide interface that forms the protective oxide layer. Conversely, the coarser grain size in MC alloys limits the diffusion of the oxide-forming components. Furthermore, the Fe-10Cr-5Al alloy showed greater resistance to oxidation than the Fe-10Cr-3Al alloy.https://www.mdpi.com/1996-1944/17/7/1700nanocrystalline alloysFe-Cr-Al alloysoxidation kineticsoxidation resistance |
| spellingShingle | Rajiv Kumar R. K. Singh Raman S. R. Bakshi V. S. Raja S. Parida Exploring the Influence of Nanocrystalline Structure and Aluminum Content on High-Temperature Oxidation Behavior of Fe-Cr-Al Alloys Materials nanocrystalline alloys Fe-Cr-Al alloys oxidation kinetics oxidation resistance |
| title | Exploring the Influence of Nanocrystalline Structure and Aluminum Content on High-Temperature Oxidation Behavior of Fe-Cr-Al Alloys |
| title_full | Exploring the Influence of Nanocrystalline Structure and Aluminum Content on High-Temperature Oxidation Behavior of Fe-Cr-Al Alloys |
| title_fullStr | Exploring the Influence of Nanocrystalline Structure and Aluminum Content on High-Temperature Oxidation Behavior of Fe-Cr-Al Alloys |
| title_full_unstemmed | Exploring the Influence of Nanocrystalline Structure and Aluminum Content on High-Temperature Oxidation Behavior of Fe-Cr-Al Alloys |
| title_short | Exploring the Influence of Nanocrystalline Structure and Aluminum Content on High-Temperature Oxidation Behavior of Fe-Cr-Al Alloys |
| title_sort | exploring the influence of nanocrystalline structure and aluminum content on high temperature oxidation behavior of fe cr al alloys |
| topic | nanocrystalline alloys Fe-Cr-Al alloys oxidation kinetics oxidation resistance |
| url | https://www.mdpi.com/1996-1944/17/7/1700 |
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