Microstructural Changes during High Temperature Service of a Cobalt-Based Superalloy First Stage Nozzle
Superalloys are a group of alloys based on nickel, iron, or cobalt, which are used to operate at high temperatures (T > 540°C) and in situations involving very high stresses like in gas turbines, particularly in the manufacture of blades, nozzles, combustors, and discs. Besides keeping its high r...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/1745839 |
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| author | A. Luna Ramírez J. Porcayo-Calderon Z. Mazur V. M. Salinas-Bravo L. Martinez-Gomez |
| author_facet | A. Luna Ramírez J. Porcayo-Calderon Z. Mazur V. M. Salinas-Bravo L. Martinez-Gomez |
| author_sort | A. Luna Ramírez |
| collection | DOAJ |
| description | Superalloys are a group of alloys based on nickel, iron, or cobalt, which are used to operate at high temperatures (T > 540°C) and in situations involving very high stresses like in gas turbines, particularly in the manufacture of blades, nozzles, combustors, and discs. Besides keeping its high resistance to temperatures which may approach 85% of their melting temperature, these materials have excellent corrosion resistance and oxidation. However, after long service, these components undergo mechanical and microstructural degradation; the latter is considered a major cause for replacement of the main components of gas turbines. After certain operating time, these components are very expensive to replace, so the microstructural analysis is an important tool to determine the mode of microstructure degradation, residual lifetime estimation, and operating temperature and most important to determine the method of rehabilitation for extending its life. Microstructural analysis can avoid catastrophic failures and optimize the operating mode of the turbine. A case study is presented in this paper. |
| format | Article |
| id | doaj-art-3f90816e09b448689ead7726672f0115 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-3f90816e09b448689ead7726672f01152025-02-03T01:09:45ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422016-01-01201610.1155/2016/17458391745839Microstructural Changes during High Temperature Service of a Cobalt-Based Superalloy First Stage NozzleA. Luna Ramírez0J. Porcayo-Calderon1Z. Mazur2V. M. Salinas-Bravo3L. Martinez-Gomez4Instituto de Investigaciones Eléctricas, Reforma 113, 62490 Cuernavaca, MOR, MexicoCIICAp, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209 Cuernavaca, MOR, MexicoInstituto de Investigaciones Eléctricas, Reforma 113, 62490 Cuernavaca, MOR, MexicoInstituto de Investigaciones Eléctricas, Reforma 113, 62490 Cuernavaca, MOR, MexicoInstituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Avenida Universidad s/n, 62210 Cuernavaca, MOR, MexicoSuperalloys are a group of alloys based on nickel, iron, or cobalt, which are used to operate at high temperatures (T > 540°C) and in situations involving very high stresses like in gas turbines, particularly in the manufacture of blades, nozzles, combustors, and discs. Besides keeping its high resistance to temperatures which may approach 85% of their melting temperature, these materials have excellent corrosion resistance and oxidation. However, after long service, these components undergo mechanical and microstructural degradation; the latter is considered a major cause for replacement of the main components of gas turbines. After certain operating time, these components are very expensive to replace, so the microstructural analysis is an important tool to determine the mode of microstructure degradation, residual lifetime estimation, and operating temperature and most important to determine the method of rehabilitation for extending its life. Microstructural analysis can avoid catastrophic failures and optimize the operating mode of the turbine. A case study is presented in this paper.http://dx.doi.org/10.1155/2016/1745839 |
| spellingShingle | A. Luna Ramírez J. Porcayo-Calderon Z. Mazur V. M. Salinas-Bravo L. Martinez-Gomez Microstructural Changes during High Temperature Service of a Cobalt-Based Superalloy First Stage Nozzle Advances in Materials Science and Engineering |
| title | Microstructural Changes during High Temperature Service of a Cobalt-Based Superalloy First Stage Nozzle |
| title_full | Microstructural Changes during High Temperature Service of a Cobalt-Based Superalloy First Stage Nozzle |
| title_fullStr | Microstructural Changes during High Temperature Service of a Cobalt-Based Superalloy First Stage Nozzle |
| title_full_unstemmed | Microstructural Changes during High Temperature Service of a Cobalt-Based Superalloy First Stage Nozzle |
| title_short | Microstructural Changes during High Temperature Service of a Cobalt-Based Superalloy First Stage Nozzle |
| title_sort | microstructural changes during high temperature service of a cobalt based superalloy first stage nozzle |
| url | http://dx.doi.org/10.1155/2016/1745839 |
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