• Fabian Kies
  • Yuji Ikeda
  • Simon Ewald
  • Johannes H. Schleifenbaum
  • Bengt Hallstedt
  • Fritz Körmann
  • Christian Haase

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.

Original languageEnglish
Pages (from-to)366-371
JournalScripta Materialia
Publication statusPublished - 2020

    Research areas

  • Additive manufacturing, Density functional theory (DFT), High-entropy alloy, Mechanical properties, Multi-principal element alloy

ID: 68311769