Deformation behavior of HCP titanium alloy: Experiment and Crystal plasticity modeling
- AGH - Univ. of Science and Technology, Krakow (Poland). Faculty of Physics and Applied Computer Science
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Materials Science and Technology Division
The deformation behavior of commercially pure titanium is studied using experiments and a crystal plasticity model. Compression tests along the rolling, transverse, and normal-directions, and tensile tests along the rolling and transverse directions are performed at room temperature to study the activation of slip and twinning in the hexagonal closed packed titanium. A detailed EBSD based statistical analysis of the microstructure is performed to develop statistics of both {10-12} tensile and {11-22} compression twins. A simple Monte Carlo (MC) twin variant selection criterion is proposed within the framework of the visco-plastic self-consistent (VPSC) model with a dislocation density (DD) based law used to describe dislocation hardening. In the model, plasticity is accommodated by prismatic, basal and pyramidal slip modes, and {10-12} tensile and {11-22} compression twinning modes. Thus, the VPSC-MC model successfully captures the experimentally observed activation of low Schmid factor twin variants for both tensile and compression twins modes. The model also predicts macroscopic stress-strain response, texture evolution and twin volume fraction that are in agreement with experimental observations.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22); Polish National Science Centre (NCN); Ministry of Science and Higher Education (Poland)
- Grant/Contract Number:
- AC52-06NA25396; FWP-06SCPE401; DEC-2015/19/D/ST8/00818
- OSTI ID:
- 1432623
- Report Number(s):
- LA-UR-17-29636
- Journal Information:
- Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Vol. 724, Issue C
- Country of Publication:
- United States
- Language:
- English
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