Laser assisted high entropy alloy coating on aluminum: Microstructural evolution

Journal Article · Sun Sep 14 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4895137· OSTI ID:22305975

Katakam, Shravana; Joshi, Sameehan S.; Mridha, Sanghita; Mukherjee, Sundeep

High entropy alloy (Al-Fe-Co-Cr-Ni) coatings were synthesized using laser surface engineering on aluminum substrate. Electron diffraction analysis confirmed the formation of solid solution of body centered cubic high entropy alloy phase along with phases with long range periodic structures within the coating. Evolution of such type of microstructure was a result of kinetics associated with laser process, which generates higher temperatures and rapid cooling resulting in retention of high entropy alloy phase followed by reheating and/or annealing in subsequent passes of the laser track giving rise to partial decomposition. The partial decomposition resulted in formation of precipitates having layered morphology with a mixture of high entropy alloy rich phases, compounds, and long range ordered phases.

• OSTI ID: 22305975
• Journal Information: Journal of Applied Physics, Vol. 116, Issue 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
ALUMINIUM ALLOYS
ANNEALING
BCC LATTICES
CHROMIUM COMPOUNDS
COBALT COMPOUNDS
COOLING
DECOMPOSITION
ELECTRON DIFFRACTION
ENTROPY
IRON ALLOYS
LASER RADIATION
MICROSTRUCTURE
NICKEL COMPOUNDS
PERIODICITY
PRECIPITATION
SOLID SOLUTIONS
SUBSTRATES
SURFACE COATING
SURFACES