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B. Viernstein, P. Schumacher, B. Milkereit, E. Kozeschnik:
"State Parameter-Based Simulation of Temperature- and Strain Rate Dependent Flow Curves of Al-Alloys";
Talk: TMS Annual Meeting & Exhibition 2020, San Diego; 2020-02-23 - 2020-02-27; in: "Light Metals 2020", Springer, (2020), ISBN: 978-3-030-36408-3; 267 - 271.

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
tests are successfully simulated. The theoretical
background of the underlying physical models and the
influence of alloying elements on the 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. In Al-alloys, especially the effect of
Mg is dominant due to its ability to diffuse from the
compression side to the tension side of the dislocations
core, leading to additional barriers for the dislocation
movement.

Flow curve; Strengthening mechanisms; Solutes; Small strains

http://dx.doi.org/10.1007/978-3-030-36408-3_38