Long-Exposure Air and Steam Oxidation Characteristics of IN 617 Alloys
India’s growing power demands and emission norms require more efficient coal-based power plants. The shifting of power plants from subcritical to ultra-supercritical (USC) steam conditions could improve efficiency by 12% and reduce CO<inline-formula><math xmlns="http://www.w3.org/1998/...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Corrosion and Materials Degradation |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2624-5558/4/1/6 |
| _version_ | 1797612542887985152 |
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| author | Rishikesh Karthikeyan Satyanaryanan Seshadri V Subramanya Sarma M Kamaraj |
| author_facet | Rishikesh Karthikeyan Satyanaryanan Seshadri V Subramanya Sarma M Kamaraj |
| author_sort | Rishikesh Karthikeyan |
| collection | DOAJ |
| description | India’s growing power demands and emission norms require more efficient coal-based power plants. The shifting of power plants from subcritical to ultra-supercritical (USC) steam conditions could improve efficiency by 12% and reduce CO<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> emissions by 35%. There is a need to develop and qualify materials under ultra-supercritical steam conditions with high temperatures and high pressures in laboratory scale. The sample materials were exposed to high temperatures of 700 °C under air and high pressure steam at 700 °C/243 bars for 1000 h in as-received and grain-boundary-enhanced conditions. Grain boundary enhancement included optimization of a thermo-mechanical process involving cold rolling and annealing of samples. The effect of air and steam oxidation on IN 617, a nickel-based candidate superalloy, was analysed. Steam oxidation was performed on a custom-built PARR 4650 series autoclave, and the oxidized samples were characterised under scanning electron microscopy, to evaluate the oxide scales. The grain-boundary-engineered material performed better than the as-received samples. IN 617 overall fared better under both air and steam conditions, with far less weight gains. |
| first_indexed | 2024-03-11T06:43:40Z |
| format | Article |
| id | doaj.art-51f36c73223f474fa8d18ef6532fe7b7 |
| institution | Directory Open Access Journal |
| issn | 2624-5558 |
| language | English |
| last_indexed | 2024-03-11T06:43:40Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Corrosion and Materials Degradation |
| spelling | doaj.art-51f36c73223f474fa8d18ef6532fe7b72023-11-17T10:24:38ZengMDPI AGCorrosion and Materials Degradation2624-55582023-01-01419010310.3390/cmd4010006Long-Exposure Air and Steam Oxidation Characteristics of IN 617 AlloysRishikesh Karthikeyan0Satyanaryanan Seshadri1V Subramanya Sarma2M Kamaraj3Department of Applied Mechanics, IIT Madras, Chennai 600036, IndiaDepartment of Applied Mechanics, IIT Madras, Chennai 600036, IndiaDepartment of Materials and Metallurgical Engineering, IIT Madras, Chennai 600036, IndiaDepartment of Materials and Metallurgical Engineering, IIT Madras, Chennai 600036, IndiaIndia’s growing power demands and emission norms require more efficient coal-based power plants. The shifting of power plants from subcritical to ultra-supercritical (USC) steam conditions could improve efficiency by 12% and reduce CO<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math></inline-formula> emissions by 35%. There is a need to develop and qualify materials under ultra-supercritical steam conditions with high temperatures and high pressures in laboratory scale. The sample materials were exposed to high temperatures of 700 °C under air and high pressure steam at 700 °C/243 bars for 1000 h in as-received and grain-boundary-enhanced conditions. Grain boundary enhancement included optimization of a thermo-mechanical process involving cold rolling and annealing of samples. The effect of air and steam oxidation on IN 617, a nickel-based candidate superalloy, was analysed. Steam oxidation was performed on a custom-built PARR 4650 series autoclave, and the oxidized samples were characterised under scanning electron microscopy, to evaluate the oxide scales. The grain-boundary-engineered material performed better than the as-received samples. IN 617 overall fared better under both air and steam conditions, with far less weight gains.https://www.mdpi.com/2624-5558/4/1/6ultra-supercriticalIN 617grain boundary enhancementgrain sizeoxide layerweight gain |
| spellingShingle | Rishikesh Karthikeyan Satyanaryanan Seshadri V Subramanya Sarma M Kamaraj Long-Exposure Air and Steam Oxidation Characteristics of IN 617 Alloys Corrosion and Materials Degradation ultra-supercritical IN 617 grain boundary enhancement grain size oxide layer weight gain |
| title | Long-Exposure Air and Steam Oxidation Characteristics of IN 617 Alloys |
| title_full | Long-Exposure Air and Steam Oxidation Characteristics of IN 617 Alloys |
| title_fullStr | Long-Exposure Air and Steam Oxidation Characteristics of IN 617 Alloys |
| title_full_unstemmed | Long-Exposure Air and Steam Oxidation Characteristics of IN 617 Alloys |
| title_short | Long-Exposure Air and Steam Oxidation Characteristics of IN 617 Alloys |
| title_sort | long exposure air and steam oxidation characteristics of in 617 alloys |
| topic | ultra-supercritical IN 617 grain boundary enhancement grain size oxide layer weight gain |
| url | https://www.mdpi.com/2624-5558/4/1/6 |
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