Understanding the links between the composition-processing-properties in new formulations of heas sintered by sps Articles uri icon

published in

publication date

  • June 2021

start page

  • 1

end page

  • 15

issue

  • 6

volume

  • 11

International Standard Serial Number (ISSN)

  • 2075-4701

abstract

  • This work presents two new compositions of high entropy alloys (HEAs) that were designed with the aim of obtaining a body-centered cubic (BCC) phase with high hardness values and a moderate density. Sintering was performed using Spark Plasma Sintering (SPS) with different heating rates to determine the influence of the processing parameters on the phase formation. The microstructural study revealed that the presence of Ni in the composition promoted phase separation, and the mechanical study confirmed a clear influence on the mechanical properties of both the composition and heating rate. The combination of microscopy with compression and nanoindentation tests at room and high temperature made it possible to advance our understanding of the relationships between the composition, processing, and properties of this emerging group of alloys.

keywords

  • composition design; compression test; gas atomization; high entropy alloy; high temperature nanoindentation; serrated flow; spark plasma sintering