Experimental and numerical investigations of plastic strain mechanisms of AISI 316L alloys with bimodal grain size distribution

Grain-Level Mechanism of Plastic Deformation in Harmonic Structure Materials Revealed by High-Resolution X-Ray Diffraction

“…It should be noted that recent results of crystal plasticity modelling on grain structures with grain size gradients or bimodal grains size distributions rationalize their mechanical behavior even without involving kinematic hardening [37,38]. In gradient-structured copper, isotropic hardening from forest dislocations has a stronger effect than the kinematic hardening [37], which agrees well with our observations at the developing regime D. Simulations of AISI 316 L steel with bimodal grain size distribution also showed an increase in the yield strength of the coarse-grained fraction compared to the homogenous counterpart [38].…”