Understanding the Sintering Behavior of AlCrFeNiTi High Entropy Alloy via Phase Field Modeling Illustration

Authors

  • Sheetal Kumar Dewangan Department of Materials Science and Engineering, Ajou University, Suwon, Korea
  • Cheenepalli Nagarjuna Department of Materials Science and Engineering, Ajou University, Suwon, Korea
  • Hansung Lee Department of Energy Systems Research, Ajou University, Suwon, Korea
  • Byungmin Ahn Department of Materials Science and Engineering, Ajou University, Suwon, Korea; Department of Energy Systems Research, Ajou University, Suwon, Korea

Abstract

In this study, a computational approach is employed to understand the densification behavior of a multi-component alloy system during the sintering process by generating a phase field modeling image. First, a single-phase body-centered cubic (BCC) AlCrFeNiTi high entropy alloy (HEA) is prepared via a mechanical alloying (MA) route, and the powder-processed HEA is shown to exhibit dual BCC phases after spark plasma sintering (SPS). Then, phase field modeling (PFM) is used to generate a generalized image and to understand densification behavior during the sintering process. The results indicate that bulk and grain-boundary diffusion take place during the early stage and grain growth of the powder particles starts when the particles interact with their adjacent grains. Subsequently, in the final sintering stage point contacts and necking were observed. This understanding has been presented based on the phase field simulation to explore the different stages of the sintering during the processing.

Downloads

Published

2023-04-13

Issue

Vol. 56 No. 2 (2024)

Section

Articles