Modeling the Effects of Dislocation-Density Interaction, Generation, and Recovery on the Behavior of HCP Materials

作者：Ziaei S; Zikry M A^*

来源：Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 2015, 46A(10): 4478-4490.

DOI：10.1007/s11661-014-2635-0

A dislocation-density-based multiple slip crystalline plasticity formulation and a specialized finite-element approach were developed and used to investigate behavior in hexagonal cubic packed with a focus on zircaloy-2 aggregates. The validated predictive framework can account for the interrelated effects of dislocation-density interactions, generation, and recovery. An energy criterion is used to identify 63 unique slip system interactions that can result in either junction formation or slip-system annihilation. These dislocation-density interactions, with the interrelated mechanisms due to recovery and generation, can then be used to understand and predict why basal planes are strengthening planes and prismatic planes are the dominant toughening planes.

• 出版日期2015-10