Journal article
A physically based model of temperature and strain rate dependent yield in BCC metals: Implementation into crystal plasticity
Journal of the mechanics and physics of solids, v 74(C)
01 Jan 2015
Abstract
In this work, we develop a crystal plasticity finite element model (CP-FEM) that constitutively captures the temperature and strain rate dependent flow stresses in pure BCC refractory metals. This model is based on the kink-pair theory developed by Seeger (1981) and is calibrated to available data from single crystal experiments to produce accurate and convenient constitutive laws that are implemented into a BCC crystal plasticity model. The model is then used to predict temperature and strain rate dependent yield stresses of single and polycrystal BCC refractory metals (molybdenum, tantalum, tungsten and niobium) and compared with existing experimental data. To connect to larger length scales, classical continuum-scale constitutive models are fit to the CP-FEM predictions of polycrystal yield stresses. The results produced by this model, based on kink-pair theory and with origins in dislocation mechanics, show excellent agreement with the Mechanical Threshold Stress (MIS) model for temperature and strain-rate dependent flow. This framework provides a method to bridge multiple length scales in modeling the deformation of BCC metals. Published by Elsevier Ltd.
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Details
- Title
- A physically based model of temperature and strain rate dependent yield in BCC metals: Implementation into crystal plasticity
- Creators
- Hojun Lim - Sandia National LaboratoriesCorbett C. Battaile - Sandia National LaboratoriesJay D. Carroll - Sandia National LaboratoriesBrad L. Boyce - Sandia National LaboratoriesChristopher R. Weinberger - Drexel University
- Publication Details
- Journal of the mechanics and physics of solids, v 74(C)
- Publisher
- Elsevier
- Number of pages
- 17
- Grant note
- DE-AC04-94AL85000 / U.S. Department of Energy's National Nuclear Security Administration; National Nuclear Security Administration
- Resource Type
- Journal article
- Language
- English
- Web of Science ID
- WOS:000347363700006
- Scopus ID
- 2-s2.0-84910675188
- Other Identifier
- 991019350585304721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Mechanics
- Physics, Condensed Matter