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Investigating spatio-temporal deformation in single crystal Ni-based superalloys using in-situ diffraction experiments and modelling by Bhowmik, Ayan; Lee, Junyi; Adande, Suki; Wang-Koh, Ming; Jun, Tea-Sung; Sernicola, Giorgio; Britton, T. Ben; Rae, Catherine M.F.; Balint, Daniel; Giuliani, Finn is a Engineering article available to read on EtoBox.
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In this study, we perform a detailed analysis of room temperature deformation of a [100]-orientated single crystal Ni-based superalloy, CMSX-4 micropillar, using a combinatorial and complimentary characterisation approach of micro-Laue diffraction coupled with post-deformation microscopy and crystal plasticity modelling. Time-resolved micro-Laue data indicated that deformation was initiated by activation of multiple slip (after 5% engineering strain) which led to the generation of a plastic strain accumulation accompanied by a two-fold increase in the dislocation density within the micropillar. Subsequent to that, slip occurred primarily on two systems ( 1 1 1 )[ 101 ] and ( 111 )[ 1 01 ] with the highest Schmid factor in the single crystal micropillar thereby resulting in little accumulation of unpaired GNDs during a major part of the loading cycle, upto 20% strain in this case. Finite element crystal plasticity modelling also showed good agreement with the experimental analyses, whereby significant strains were found to develop in the above slip systems with a localisation near the centre of the micropillar. Post-deformation transmission electron microscopy study confirmed that d
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- Author
- Bhowmik, Ayan; Lee, Junyi; Adande, Suki; Wang-Koh, Ming; Jun, Tea-Sung; Sernicola, Giorgio; Britton, T. Ben; Rae, Catherine M.F.; Balint, Daniel; Giuliani, Finn
- Publisher
- Elsevier ; Elsevier BV (ISSN 2589-1529)
- Published
- 2020
- Language
- EN
- Field
- Engineering (Physical Sciences)