Combined Al and C alloying enables mechanism-oriented design of multi-principal element alloys

Ab initio calculations and experiments

Journal article (2020)

Authors

Fabian Kies Rheinisch-Westfälische Technische Hochschule
Yuji Ikeda Max-Planck-Institut für Eisenforschung, University of Stuttgart
Simon Ewald Rheinisch-Westfälische Technische Hochschule
Johannes H. Schleifenbaum Fraunhofer Institute for Laser Technology (ILT), Rheinisch-Westfälische Technische Hochschule
Bengt Hallstedt Rheinisch-Westfälische Technische Hochschule
F.H.W. Körmann (OLD) MSE-7 , Max-Planck-Institut für Eisenforschung
Christian Haase Rheinisch-Westfälische Technische Hochschule
Research Group
(OLD) MSE-7
Copyright: © 2020 Fabian Kies, Yuji Ikeda, Simon Ewald, Johannes H. Schleifenbaum, Bengt Hallstedt, F.H.W. Körmann, Christian Haase
DOI: https://doi.org/10.1016/j.scriptamat.2019.12.004
More Info
expand_more

Published Date

2020

Language

English

Research Group

(OLD) MSE-7

Abstract

Density functional theory (DFT) calculations were performed on AlxCyCoFeMnNi multi-principal element alloys (MPEAs) to understand the influence of Al and C on the stacking-fault energy (SFE). C addition to CoFeMnNi resulted in increased SFE, while it decreased in Al-alloyed CoFeMnNi. For experimental verification, Al0.26CyCoFeMnNi with 0, 1.37 and 2.70 at% C were designed by computational thermodynamics, produced by additive manufacturing (AM) and characterized by tensile tests and microstructure analysis. Twinning-induced plasticity (TWIP) was enhanced with increased C, which confirmed a decreased SFE. The combination of these methods provides a promising toolset for mechanism-oriented design of MPEAs with advanced mechanical properties.

Files

Preprint.pdf
(pdf | 4.24 Mb)
help_outline

Download not available

1_s2.0_S1359646219307237_main.... (pdf)
(pdf | 2.54 Mb)
- Embargo expired in 12-06-2020
Unknown license