Dislocation mechanics based constitutive equation incorporating dynamic recovery and applied to thermomechanical shear instability
Journal Article
·
· AIP Conference Proceedings
- Energetic Materials Research and Technology Department, Naval Surface Warfare Center Indian Head Division, Indian Head, Maryland 20604-5035 (United States)
A closer look into the predicted large strain response and plastic shear instability behavior derived from the so-called Z-A equations, incorporating thermally activated yielding of bcc metals (due to their high Peierls stresses) and thermally activated strain hardening of fcc metals (produced by dislocation intersections), shows the need for including dynamic recovery effects in the strain hardening for both bcc and fcc cases. Recovery effects are observed in the stress/strain behavior of tantalum and the bcc-like Ti-6A1-4V titanium alloy. Critical strains for shear banding are computed for Ti-6Al-4V, copper, and ARMCO iron. In addition, a recent result on ductile fracture is reported.
- OSTI ID:
- 21185626
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 429; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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