Laplanche, G., Gadaud, P., Horst, O., Otto, F., Eggeler, G. and George, E.P. (2015) Temperature Dependencies of the Elastic Moduli and Thermal Expansion Coefficient of an Equiatomic, Single-Phase CoCrFeMnNi High-Entropy Alloy. Journal of Alloys and Compounds, 623, 348-353. https://doi.org/10.1016/j.jallcom.2014.11.061

has been cited by the following article:

• TITLE: Analysis of Deformation in a High Entropy Alloy Using an Internal State Variable Model

  AUTHORS: Aaron Stein, Paul S. Follansbee

  KEYWORDS: High Entropy Alloys, Constitutive Modeling, Strain-Hardening, Deformation, Dynamic Strain Aging

  JOURNAL NAME: Materials Sciences and Applications, Vol.8 No.6, June 21, 2017

  ABSTRACT: Deformation in the model high entropy alloy CoCrFeMnNi is assessed using an internal state variable constitutive model. A remarkable property of these alloys is the extraordinarily high strain hardening rates they experience in the plastic region of the stress strain curve. Published stress-strain measurements over a range of temperatures are analyzed. Dislocation obstacle interactions and the observed high rate of strain hardening are characterized in terms of state variables and their evolution. A model that combines a short-range obstacle and a long-range obstacle is shown to match experimental measurements over a wide range of temperatures and grain sizes. The long-range obstacle is thought to represent interactions of dislocations with regions of incomplete mixing or partial segregation. Dynamic strain aging also is observed at higher temperatures. Comparisons with measurements in austenitic stainless steel show some common trends.