About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys, Processing and Characterization
|
Presentation Title |
State Parameter-based Simulation of Temperature- and Strain Rate Dependent Flow Curves of Al-alloys |
Author(s) |
Bernhard Viernstein, Philipp Schumacher, Benjamin Milkereit, Ernst Kozeschnik |
On-Site Speaker (Planned) |
Bernhard Viernstein |
Abstract Scope |
When simulating the material behavior during thermo-mechanical processes, the understanding of the microstructure evolution is fundamental. Therefore, state parameter-based models are utilized to describe physical effects such as work hardening, precipitation hardening, solid solution hardening and cross core diffusion. Using the thermo-kinetic software package MatCalc, temperature- and strain rate dependent flow curves of compression- and tensile tests are successfully simulated. The theoretical background of the underlying physical models and the influence of alloying elements on the work hardening and cross core diffusion behavior are discussed. Various Al-alloys are investigated and the experimentally obtained flow curves are evaluated in terms of initial strain hardening rate, initial yield stress and saturation stress. Especially the effect of Mg is dominant while investigating Al-alloys, based on its ability to diffuse from the compression side to the tension side of the dislocations core, leading to additional barriers for the dislocation movement. |
Proceedings Inclusion? |
Planned: Light Metals |