|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||On the Strain Gradient Plasticity Phenomenon in CrCoNi Medium Entropy Alloys
||Mobin Vandadi, Tabiri Kwayie Asumadu, Desmond Klenam, Nima Rahbar, Winston Soboyejo
|On-Site Speaker (Planned)
||Tabiri Kwayie Asumadu
This paper presents results of experimental and theoretical/computational study of the strain gradient plasticity phenomenon in CrCoNi medium entropy alloy (MEA). The size dependence of the mechanical properties of the as-cast, hot-rolled and heat-treated alloys were studied using the mechanistic and phenomenological theories. Numerical simulations were validated based on the experimental data across the various microstructural length scale. The hardness of the material changed as the processing methods varied. The statistically stored and geometrically necessary dislocations densities were high in the heat-treated samples than for the as-rolled and as- received conditions. The impact of processing parameters on material length and dislocation microstructure evolution are further elucidated. The underlying strain gradient plasticity mechanisms are elucidated before exploring the implications of the current results for the design of robust of low-cost medium entropy alloys structural applications.
||Planned: Metallurgical and Materials Transactions