A dislocation density based crystal plasticity finite element model: Application to a two-phase polycrystalline HCP/BCC composites |
| |
| Institution: | 1. Department of Mechanical Engineering, University of New Hampshire, Durham, NH 03824, USA;2. Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;1. Department of Mechanical Engineering, University of New Hampshire, Durham, NH 03824, USA;2. Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;3. Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;1. Department of Mechanical Engineering, University of New Hampshire, Durham, NH 03824, USA;2. Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;3. Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;1. Department of Mechanical Engineering, University of New Hampshire, Durham, NH 03824, USA;2. Mechanics of Materials Section, ExxonMobil Upstream Research Company, Houston, TX 77098, USA;3. Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;4. Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;1. Department of Mechanical Engineering, University of New Hampshire, Durham, NH 03824, USA;2. Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;3. Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;1. Department of Mechanical Engineering, University of New Hampshire, Durham, NH 03824, USA;2. Department of Mechanical & Aerospace Engineering, New Mexico State University, Las Cruces, NM 88003, USA;3. Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;1. Department of Mechanical Engineering, University of New Hampshire, Durham, NH 03824, USA;2. Materials Department, University of California at Santa Barbara, Santa Barbara, CA 93106, USA;3. Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;4. Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA |
| |
| Abstract: | We present a multiscale model for anisotropic, elasto-plastic, rate- and temperature-sensitive deformation of polycrystalline aggregates to large plastic strains. The model accounts for a dislocation-based hardening law for multiple slip modes and links a single-crystal to a polycrystalline response using a crystal plasticity finite element based homogenization. It is capable of predicting local stress and strain fields based on evolving microstructure including the explicit evolution of dislocation density and crystallographic grain reorientation. We apply the model to simulate monotonic mechanical response of a hexagonal close-packed metal, zirconium (Zr), and a body-centered cubic metal, niobium (Nb), and study the texture evolution and deformation mechanisms in a two-phase Zr/Nb layered composite under severe plastic deformation. The model predicts well the texture in both co-deforming phases to very large plastic strains. In addition, it offers insights into the active slip systems underlying texture evolution, indicating that the observed textures develop by a combination of prismatic, pyramidal, and anomalous basal slip in Zr and primarily {110}〈111〉 slip and secondly {112}〈111〉 slip in Nb. |
| |
| Keywords: | Dislocations Texture Interfaces Crystal plasticity Finite elements Accumulative roll bonding |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
