|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Grain Boundaries and Interfaces: Metastability, Disorder, and Non-Equilibrium Behavior
||Slip Transfer of Dislocations Across 3D Interfaces in a Cu/Nb System
||Shuozhi Xu, Justin Y. Cheng, Zezhou Li, Nathan A. Mara, Irene J. Beyerlein
|On-Site Speaker (Planned)
In metallic systems, 3D interfaces are heterophase interfaces that extend out of plane into the two crystals. Unlike 2D sharp interfaces across which the material properties change abruptly, the 3D interfaces provide a smoother intergranular transition in material properties. In addition, a 3D interface itself is chemically and crystallographically dissimilar from the two crystals that join. While many numerical studies of the interactions between dislocations and 2D interfaces have been conducted, fewer efforts were devoted to 3D interfaces in the same context. Here, we focus on the nanolayered Cu/Nb containing interfaces with 3D character. The slip transfer of dislocations across 3D interfaces are simulated via a phase-field dislocation dynamics (PFDD) method. In PFDD, the heterogeneities with a general geometry and plastic deformation on slip planes progress hand in hand. Selected simulation results are benchmarked against analytical solutions. Origins of the enhancement in strength and plasticity in the nanolaminates are discussed.
||Computational Materials Science & Engineering, Copper / Nickel / Cobalt, Mechanical Properties