About this Abstract |
Meeting |
2021 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 |
Non-linear Reversible Behaviour of Metallic Alloys at Low Stresses |
Author(s) |
Jaji Naveena Chamakura, Vera Popovich, Jilt Sietsma |
On-Site Speaker (Planned) |
Jaji Naveena Chamakura |
Abstract Scope |
The elastic material behaviour of metals is more complex than the generally assumed linear behaviour. This is primarily due to the reversible behaviour of dislocations. This work aims to investigate the fundamentals of non-linear stress-strain reversible behaviour at low stresses of industrial-grade metal alloys. Mechanical testing is performed in various relevant loading modes with a focus on the measurement of small strains and corresponding stresses, occurring in the elastic regime. The non-linearity is quantitatively analyzed in microstructural aspects, as opposed to the common approximation of an empirical determination of apparent Young’s modulus. The detailed analysis of the experimental evidence on the non-linear elastic behaviour, hysteresis and microplasticity will be used to further investigate and extend model descriptions that are based on the dislocation behaviour of the material. The physical basis of the models will provide the possibility of application for predictive and quantitative modelling of low-stress behaviour in various metals. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Characterization, Other |