2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 1: Aifantis Intl. Symp. / Multiscale Material Mechanics
| Editors: | Kongoli F, Bordas S, Estrin Y |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 300 pages |
| ISBN: | 978-1-987820-24-9 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Large Scale Discrete Dislocation Dynamics Simulations of Plastic Deformation of Nickel Superalloys
Jaafar El-Awady1; Ahmed Hussein1;1JOHNS HOPKINS UNIVERSITY, Baltimore, United States;
Type of Paper: Regular
Id Paper: 233
Topic: 1
Abstract:
Large scale three-dimensional discrete dislocation dynamics (DDD) simulations are utilized to study the plastic response of Nickel superalloys. In DDD, individual dislocations are tracked and physics-based precipitate penetration rules as well as glide rules in both gamma and gamma phases are implemented. Starting with a general distribution of gamma phases dispersed in a single crystal gamma phase, the dislocation microstructure is evolved in time under the applied load and the material behavior is computed accordingly. DDD simulations for both shearable and non-shearable gamma phases are discussed. The influence of volume fraction, channel width, initial dislocation density and crystal sizes on the strain hardening and density evolution are assessed. The simulations are validated with detailed comparisons with experiments.