Effect of chromium variation on evolution of magnetic properties in laser direct energy additively processed CoCrxFeNi alloys
Journal article, 2023

The soft magnetic behavior of laser directed energy deposited CoCrxFeNi (x = 0 - 24 at.% Cr) alloys has been investigated as a function of chromium content. The saturation magnetization of these CoCrxFeNi alloys monotonically decreased with increasing concentration of Cr, and exhibited paramagnetic behavior at room temperature for equiatomic CoCrFeNi alloy composition. Similarly, the Curie temperature (Tc) of the ferromagnetic CoFeNi alloy linearly decreased with Cr content, while the paramagnetic equiatomic alloy indicated a ferromagnetic transition temperature of 94 K. Interestingly, all the as-deposited alloys exhibited coercivity values less than 2 Oe irrespective of the Cr content. The results indicate that the magnetic behavior of the ferromagnetic CoFeNi alloy can be systematically tuned with addition of antiferromagnetic Cr, and the additive manufacturing route was successful in rapid processing alloys of any desired composition, in a high throughput manner, with negligible chemical variation. These findings are promising for the fabrication of components for applications demanding gradient magnetic coatings and alloys.

Author

M Radhakrishnan

University of North Texas

M. McKinstry

University of North Texas

Varun Chaudhary

University of North Texas

M. S.K.K.Y. Nartu

University of North Texas

K. V.Mani Krishna

University of North Texas

R. V. Ramanujan

Nanyang Technological University

R. Banerjee

University of North Texas

N. B. Dahotre

University of North Texas

Scripta Materialia

1359-6462 (ISSN)

Vol. 226 115269

Subject Categories

Manufacturing, Surface and Joining Technology

Metallurgy and Metallic Materials

Condensed Matter Physics

DOI

10.1016/j.scriptamat.2022.115269

More information

Latest update

7/9/2024 2