|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||Crystal Plasticity and HR-DIC Studies of Slip and Strain Localisation in Single and Polycrystal Ni Alloys under Cyclic Bending
||Yongjun Guan, Ben Britton, Jun Jiang, Fionn Dunne
|On-Site Speaker (Planned)
We have carried out bend testing of single crystal Ni with differing crystallographic orientations and on large-grained Ni oligocrystals. SEM and HR-DIC have been employed to quantify slip activation and development, and strain localisation in defined regions of interest including that at grain boundaries. Direct replication of the sample loading and grain morphologies, and crystallographic orientations, has been carried out with crystal plasticity modelling such that point-by-point comparisons between crystal modelling and HR-DIC measurement may be obtained.
In single crystal studies, slip activation, strain development and localisation, as expected, depend upon crystal orientation with respect to the loading, which the crystal plasticity model captures, together with secondary and higher slip activations. In the oligocrystal samples similarly tested, and modelled, slip activation within adjacent grains was quantified and correctly captured by the crystal model. Detailed comparison of crystal model predictions with HR-DIC also demonstrates really good agreement, both qualitatively and quantitatively.
||Planned: EPD Congress Volume