| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Cyclic Deformation in Tension and Compression of Pure Aluminium Monitored In-situ by High-resolution Reciprocal Space Mapping |
| Author(s) |
Annika M Diederichs, Ulrich Lienert, Wolfgang Pantleon |
| On-Site Speaker (Planned) |
Wolfgang Pantleon |
| Abstract Scope |
Commercially pure aluminium is cyclically deformed in symmetric tension and compression while monitoring the microstructure by high-resolution reciprocal space mapping. The synchrotron technique enables resolving subgrains, orientation spread and elastic stresses in individual grains. Following four grains through 10000 tension compression cycles, reciprocal space maps were gathered after different number of cycles and through five subsequent cycles. More pronounced changes occur within individual load cycles than during an increase in number of cycles. Radial profiles revealed a characteristic behavior: the integral width follows a butterfly pattern and the asymmetry changes sign corresponding to the applied stress, but increases markedly during unloading. Based on the observation of a larger asymmetry in the unloaded state than at maximum tension or compression and the behavior of individual subgrains tracked during the cycles, necessary modification of the composite model for cyclic deformation (even in its refined version) are outlined. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |