Figure 4 Evolution of yield stress.
Evolution of yield surface with increasing levels of plastic deformation was studied.
Simulated evolution of yield strength with irradiation agrees well with the experimental data of irradiation strengthening of stainless steel 304L, 316L and T91.
The process control relies on an in-line, non-invasive magnetic resonance imaging (MRI) rheometer to monitor real-time evolution of yield stress during liquefaction.
The inelastic deformation is predicted based on the mobile dislocation density, and the immobile dislocation density is adopted to predict the evolution of yield surface.
It is reported that experimental studies have shown that nanocrystalline metals exhibit higher mechanical response with higher strain-rate [13, 30, 41, 42]. Figure 5 Evolution of yield stress as a function of strain/strain rate.
Further studies, in the main part, were associated with the investigations of evolution of yield surfaces for Al Cu bimetal and components in the range of strains from proportional limit to 0.3%.
The microstructural models are combined with a previously developed yield strength model and the evolution of yield strengths during isothermal and non-isothermal aging of AlMgSi(Cu) alloys, with various pre-aging histories, are modeled.
The elastic modulus and work hardening exponent are independent of elastic or plastic deformation and the evolution of yield strength follows the stress strain curve of Ni thin film due to work hardening.
The optimization process is analyzed in terms of: (1) catalytic figures of merit, i.e., evolution of yield and selectivity towards different products and (2) framework behavior and variable significance.
The convected plasticity model proposed by Wu, 2003a, Wu, 2003b, Wu, 2005, Wu, 2007, making use of convected coordinate system, is applied to discuss the evolution of yield surface.
