A micromechanical framework for simulating the deformation response of BCC metals.
Conference
·
OSTI ID:1030372
Recently, molecular dynamics simulations (e.g. Groger et al. Acta Mat. vol.56) have uncovered new insights into dislocation motion associated with plastic deformation of BCC metals. Those results indicate that stress necessary for glide along 110[111] crystallographic systems plus additional shear stresses along non-glide directions may accurately characterize plastic flow in BCC crystals. Further, they are readily adaptable to micromechanical formulations used in crystal plasticity models. This presentation will discuss an adaptation into a classical mechanics framework for use in a large scale rate-dependent crystal plasticity model. The effects of incorporating the non-glide influences on an otherwise associative flow model are profound. Comparisons will be presented that show the effect of the non-glide stress components on tension-compression yield stress asymmetry and the evolution of texture in BCC crystals.
- Research Organization:
- Sandia National Laboratories
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1030372
- Report Number(s):
- SAND2010-7646C
- Country of Publication:
- United States
- Language:
- English
Similar Records
Local and polycrystalline textures in BCC metals; their evolution and effect on mechanical response.
Micromechanical modeling of superplastic deformation
Conference
·
Wed Dec 31 23:00:00 EST 2003
·
OSTI ID:977877
Micromechanical modeling of superplastic deformation
Journal Article
·
Mon May 01 00:00:00 EDT 1995
· Acta Metallurgica et Materialia
·
OSTI ID:55332