About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
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| Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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| Presentation Title |
Impact of the Architecture / Texture on the Mechanical Behavior of Ni-microwires: How to Drive the Strength and Ductility |
| Author(s) |
Ravi Raj Purohit Purushottam Raj Purohit, Alla Ndiaye Dieng, Celine Gerard, Loic Signor, Abhinav Arya, Girish Bojjawar, Satyam Suwas, Atul H. Chokshi, Ludovic Thilly |
| On-Site Speaker (Planned) |
Celine Gerard |
| Abstract Scope |
Severely cold drawn Ni micro-wires mechanical behavior has been intensively studied showing the architecture key-role in the observed significant size effects [Purushottam et al, Sc Rep, 2019], where their tensile strength approaches the theoretical strength with a reduction of diameter from 120 µm down to 20 µm [Warthi et al, Script Mat, 2013]. In-situ deformation study under synchrotron radiation allowed to achieve a fundamental understanding of the observed size effect by monitoring the evolution of microstructure (including dislocation storage) and detecting elastic-plastic transition in the different grain families. Realistic 3D microstructures were generated using EBSD maps and texture information. Crystal plasticity FE simulations were performed, both with semi-phenomenological and physical-based models fed by dislocations densities experimentally obtained during TEM observations. The influence of different microstructural parameters was investigated. The feasibility of driving the micro-wires strength and ductility by the architecture design is discussed. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |