Abstract
In the current works, both micro- and macro-mechanical properties of a hexagonal close-packed (HCP) polycrystalline ZEK100 magnesium alloy were investigated. In the experimental perspective, in-situ high energy X-ray diffraction (HEXRD) from a synchrotron source was conducted during the uniaxial tension along the rolling direction (RD) and the transverse direction (TD) to measure the lattice strain evolutions and stress-strain behaviors. In the modeling perspective, crystal plasticity finite element (CPFE) model was developed incorporating the deformation twinning for the HCP-structured metals. The HEXRD experiments and crystal plasticity models were then coupled to characterize the constitutive behaviors of the ZEK100 alloy. The lattice strain data representing the microscopic behavior of the material and the macroscopic stress-strain behavior were then tied together as objective values to estimate the critical resolved shear stress (CRSS) and hardening parameters of available slip and twin systems of the ZEK100 alloy using the developed CPFE model. The stress-strain behavior as well as the lattice strain variation during the uniaxial tension tests are presented using the CPFE model and compared with the actual HEXRD data.
| Original language | English |
|---|---|
| Article number | 12031 |
| Journal | Journal of Physics: Conference Series |
| Volume | 1063 |
| Issue number | 1 |
| DOIs | |
| State | Published - Aug 6 2018 |
| Event | NUMISHEET 2018: 11th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes - Tokyo, Japan Duration: Jul 30 2018 → Aug 3 2018 |
Funding
This work was supported by the U.S. Department of Energy (DOE) under Cooperative Agreement Number DE-EE0007756, with the United States Automotive Materials Partnership LLC (USAMP). This research used resources of the Advanced Photon Source (APS), a U.S. DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. Oak Ridge National Laboratory is operated by UT-Battelle, LLC, for the U.S. DOE under contract DE-AC05-00OR22725. Pacific Northwest National Laboratory is operated by Battelle Memorial Institute for the U.S. DOE under Contract no. DE-AC06-76RL01830.
| Funders | Funder number |
|---|---|
| United States Automotive Materials Partnership LLC | |
| U.S. Department of Energy | DE-EE0007756 |
| Battelle | DE-AC06-76RL01830 |
| Office of Science | |
| Argonne National Laboratory | DE-AC05-00OR22725, DE-AC02-06CH11357 |