Understanding the Links between the Composition-Processing-Properties in New Formulations of HEAs Sintered by SPS

Metals

卷:11

Alvaro Vaz-Romero¹  Jesús González-Julián²  Jon Molina-Aldareguía³  MiguelAlberto Monclús³  Estela Prieto⁴  Paula Alvaredo-Olmos⁴ 

[1] Continuum Mechanics and Structural Analysis Universidad Carlos III de Madrid, Avda. Universidad, 30, Leganés, 28911 Madrid, Spain;

[2] Forschungszentrum Jülich GmbH (IEK-1), 52425 Jülich, Germany;

[3] IMDEA Materials Institute, C/Eric Kandel 2, Getafe, 28906 Madrid, Spain;

[4] Materials Science and Engineering and Chemical Engineering Department, IAAB, Universidad Carlos III de Madrid, Avda. Universidad, 30, Leganés, 28911 Madrid, Spain;

关键词: composition design;    high entropy alloy;    gas atomization;    Spark Plasma Sintering;    high temperature nanoindentation;    serrated flow;   

DOI  :  10.3390/met11060888

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown