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Title: Laser assisted high entropy alloy coating on aluminum: Microstructural evolution

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.
Authors:
; ; ; ;  [1]
  1. Department of Materials Science and Engineering, University of North Texas, 1150 Union Circle, 305310 Denton, Texas 76203-5017 (United States)
Publication Date:
OSTI Identifier:
22305975
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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