In Situ Deformation at 850°C of Standard and Rafted Microstructures of Nickel Base Superalloys |
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| Journal | Materials Science Forum (Volume 509) |
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| Volume | Advanced Structural Materials II |
| Edited by | H. Balmori-Ramírez, M. Brito, J.G. Cabañas-Moreno, H.A. Calderón-Benavides, K. Ishizaki and A. Salinas-Rodríguez |
| Pages | 57-62 |
| DOI | 10.4028/www.scientific.net/MSF.509.57 |
| Citation | Nicole Clément et al., 2006, Materials Science Forum, 509, 57 |
| Online since | March, 2006 |
| Authors | Nicole Clément, Mustafa Benyoucef, M. Legros, Pierre Caron, Armand Coujou |
| Keywords | Creep, Dislocations, Nickel Superalloys, Plastic Deformation Mechanisms, Rafted Microstructure |
| Abstract | An in situ study of the plastic deformation of <001> single crystals of an industrial superalloy has been performed at 850 °C in a TEM to observe directly the micromechanisms which control the deformation under the actual temperature and stress conditions experienced by this material in aeroengines. A comparison between the creation and propagation modes of moving dislocations in the standard microstructure after annealing and the rafted microstructure after 20 h of creep at 1050°C evidence the important role of the width of the γ channels as well as the strength of the γ/γ’ interface in controlling the shearing events of γ’ channels. |
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