Characterization and modeling of mechanical behavior of single crystal titanium deformed by split-Hopkinson pressure bar
Journal Article
·
· International Journal of Plasticity
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Single crystal titanium samples were dynamically loaded using split-Hopkinson pressure bar (SHPB) and the resulting microstructures were examined. Characterization of the twins and dislocations present in the microstructure was conducted to understand the pathway for observed mechanical behavior. Electron backscatter diffraction (EBSD) was used to measure textures and quantify twinning. Microstructures were profusely twinned after loading, and twin variants and corresponding textures were different as a function of initial orientation. Focused ion beam (FIB) foils were created to analyze dislocation content using transmission electron microscopy (TEM). Large amounts of dislocations were present, indicating that plasticity was achieved through slip and twinning together. Viscoplastic self-consistent (VPSC) modeling was used to confirm the complex order of operations during deformation. The activation of different mechanisms was highly dependent upon crystal orientation. For [0001] and View the MathML source[101¯1]-oriented crystals, compressive twinning was observed, followed by secondary tensile twinning. Furthermore, dislocations though prevalent in the microstructure, contributed to final texture far less than twinning.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1258282
- Alternate ID(s):
- OSTI ID: 1425694
- Report Number(s):
- LA-UR--15-26741
- Journal Information:
- International Journal of Plasticity, Journal Name: International Journal of Plasticity Journal Issue: C Vol. 82; ISSN 0749-6419
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Crystallographic characters of {11¯22} twin-twin junctions in titanium
|
journal | November 2017 |
Similar Records
Coupled elasticity, plastic slip, and twinning in single crystal titanium loaded by split-Hopkinson pressure bar
Split-Hopkinson pressure bar tests on pure tantalum
In Situ Characterization of the Effect of Twin-Microstructure Interactions on {$1 0 \bar{1} 2$} Tension and {$1 0\bar {1} 1$} Contraction Twin Nucleation, Growth and Damage in Magnesium
Journal Article
·
Sun Jul 01 20:00:00 EDT 2018
· Journal of the Mechanics and Physics of Solids
·
OSTI ID:1459822
Split-Hopkinson pressure bar tests on pure tantalum
Journal Article
·
Fri Jul 10 00:00:00 EDT 1998
· AIP Conference Proceedings
·
OSTI ID:21185648
In Situ Characterization of the Effect of Twin-Microstructure Interactions on {$1 0 \bar{1} 2$} Tension and {$1 0\bar {1} 1$} Contraction Twin Nucleation, Growth and Damage in Magnesium
Journal Article
·
Wed Oct 21 20:00:00 EDT 2020
· Metals
·
OSTI ID:1868220