The role of particle ripening on the creep acceleration of Nimonic 263 superalloy
Physically based constitutive equations need to incorporate the most relevant microstructural features of materials to adequately describe their mechanical behaviour. To accurately model the creep behaviour of precipitation hardened alloys, the value and the evolution of strengthening particle size...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2014-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/matecconf/20141414001 |
| _version_ | 1818882653057712128 |
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| author | Angella Giuliano Donnini Riccardo Ripamonti Dario Maldini Maurizio |
| author_facet | Angella Giuliano Donnini Riccardo Ripamonti Dario Maldini Maurizio |
| author_sort | Angella Giuliano |
| collection | DOAJ |
| description | Physically based constitutive equations need to incorporate the most relevant microstructural features of materials to adequately describe their mechanical behaviour. To accurately model the creep behaviour of precipitation hardened alloys, the value and the evolution of strengthening particle size are important parameters to be taken into account. In the present work, creep tests have been run on virgin and overaged (up to 3500 h at 800 ∘C) Nimonic 263, a polycrystalline nickel base superalloy used for combustion chambers of gas turbines. The experimental results suggest that the reinforcing particle evolution is not the main reason for the creep acceleration that seems to be better described by a strain correlated damage, such as the accumulation of mobile dislocations or the grain boundary cavitation. The coarsened microstructure, obtained by overageing the alloy at high temperature before creep testing, mainly influences the initial stage of the creep, resulting in a higher minimum creep rate and a corresponding reduction of the creep resistance. |
| first_indexed | 2024-12-19T15:21:10Z |
| format | Article |
| id | doaj.art-2659d209a40a476a8bfcb3e062895a6e |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-12-19T15:21:10Z |
| publishDate | 2014-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-2659d209a40a476a8bfcb3e062895a6e2022-12-21T20:16:00ZengEDP SciencesMATEC Web of Conferences2261-236X2014-01-01141400110.1051/matecconf/20141414001matecconf_eurosuperalloys14_14001The role of particle ripening on the creep acceleration of Nimonic 263 superalloyAngella GiulianoDonnini RiccardoRipamonti DarioMaldini MaurizioPhysically based constitutive equations need to incorporate the most relevant microstructural features of materials to adequately describe their mechanical behaviour. To accurately model the creep behaviour of precipitation hardened alloys, the value and the evolution of strengthening particle size are important parameters to be taken into account. In the present work, creep tests have been run on virgin and overaged (up to 3500 h at 800 ∘C) Nimonic 263, a polycrystalline nickel base superalloy used for combustion chambers of gas turbines. The experimental results suggest that the reinforcing particle evolution is not the main reason for the creep acceleration that seems to be better described by a strain correlated damage, such as the accumulation of mobile dislocations or the grain boundary cavitation. The coarsened microstructure, obtained by overageing the alloy at high temperature before creep testing, mainly influences the initial stage of the creep, resulting in a higher minimum creep rate and a corresponding reduction of the creep resistance.http://dx.doi.org/10.1051/matecconf/20141414001 |
| spellingShingle | Angella Giuliano Donnini Riccardo Ripamonti Dario Maldini Maurizio The role of particle ripening on the creep acceleration of Nimonic 263 superalloy MATEC Web of Conferences |
| title | The role of particle ripening on the creep acceleration of Nimonic 263 superalloy |
| title_full | The role of particle ripening on the creep acceleration of Nimonic 263 superalloy |
| title_fullStr | The role of particle ripening on the creep acceleration of Nimonic 263 superalloy |
| title_full_unstemmed | The role of particle ripening on the creep acceleration of Nimonic 263 superalloy |
| title_short | The role of particle ripening on the creep acceleration of Nimonic 263 superalloy |
| title_sort | role of particle ripening on the creep acceleration of nimonic 263 superalloy |
| url | http://dx.doi.org/10.1051/matecconf/20141414001 |
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