|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Magnesium Technology 2018
||C-77: Rate and Temperature Dependent Deformation Behavior of WE43 Magnesium-rear Earth Alloy: Experiments and Crystal Plasticity Modeling
||Marko Knezevic, Saeede Ghorbanpour , Milan Ardeljan, Brandon A McWilliams
|On-Site Speaker (Planned)
This paper describes the main results from an experimental investigation into the quasi-static and dynamic behavior of rolled and cast WE43 including the anisotropic stress-strain response, strain-hardening rates, tension/compression asymmetry, deformed sample geometry, fracture, concomitant evolution of crystallographic texture, and deformation twin fraction. The examination is conducted in function of strain rates from 10^-3/s to 10^5/s, temperatures from room to 400C, and testing direction. The comprehensive set of data is used to calibrate and validate a strain rate and temperature sensitive multi-level finite element crystal plasticity model specifically adapted to the behavior of WE43. The same quantities as experimentally characterized are calculated with the model and good agreement is achieved in all aspects. These predictions allowed us to elucidate the role played by various slip and twin mechanisms on the mechanical behavior of WE43 as well as to perform the comparison with behavior of other magnesium alloys.