Understanding the Links between the Composition-Processing-Properties in New Formulations of HEAs Sintered by SPS
Paula Alvaredo-Olmos,
Jon Molina-Aldareguía,
Alvaro Vaz-Romero,
Estela Prieto,
Jesús González-Julián,
Miguel Alberto Monclús
Affiliations
Paula Alvaredo-Olmos
Materials Science and Engineering and Chemical Engineering Department, IAAB, Universidad Carlos III de Madrid, Avda. Universidad, 30, Leganés, 28911 Madrid, Spain
Jon Molina-Aldareguía
IMDEA Materials Institute, C/Eric Kandel 2, Getafe, 28906 Madrid, Spain
Alvaro Vaz-Romero
Continuum Mechanics and Structural Analysis Universidad Carlos III de Madrid, Avda. Universidad, 30, Leganés, 28911 Madrid, Spain
Estela Prieto
Materials Science and Engineering and Chemical Engineering Department, IAAB, Universidad Carlos III de Madrid, Avda. Universidad, 30, Leganés, 28911 Madrid, Spain
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.
