Developing CoCrFeNi high Entropy Alloy with Mo and Nb Via In-situ Alloying in Laser Powder Bed Fusion (PBF-LB/M) and Evaluating its High Temperature Properties Articles uri icon

publication date

  • March 2025

start page

  • 489

end page

  • 496

volume

  • 72

International Standard Serial Number (ISSN)

  • 0532-8799

Electronic International Standard Serial Number (EISSN)

  • 1880-9014

abstract

  • High Entropy Alloys (HEAs), a novel class of materials diverging from conventional alloying concept of single principal element, show immense potential, especially in high-temperature applications. This study leverages Laser Powder Bed Fusion (PBF-LB/M) to manufacture a CoCrFeNi-based HEA alloyed with minor additions of Mo and Nb using commercial powders like Ni-base superalloys and 316L in a cost-effective approach. The as-printed compositions resulted in alloys with single-phase FCC upon printing. Tensile tests at 700oC, 800oC, and 900 degrees C reveal enhanced strength compared to similar alloys in the literature, facilitated by Mo and Nb-rich precipitates. This work not only advances understanding of HEAs but also offers insights for future alloy design, highlighting the efficiency of PBF-LB/M in creating intricate components with complex compositions and improved mechanical properties for high-temperature applications with relative ease.

subjects

  • Materials science and engineering

keywords

  • high entropy alloys; commercial commodity powders; laser powder bed fusion; in-situ alloying