Laser Beam Welding of Feconicrmn High-Entropy Alloys with Preplaced Powders

Abstract

In this paper, as-annealed FeCoNiCrMn plates were laser-welded with preplaced FeCoNiCrMn and FeCoNiCrAl powders, respectively. The grains in the fusion zone of the weld with FeCoNiCrMn powder have a reduced aspect ratio compared to those without preplaced powders and the weld with FeCoNiCrAl powder presents relative equiaxed grains. The yield strength of each weld has been remarkably enhanced when referring to the base alloy, and the ultimate tensile strength of each weld with preplaced powder exceeds 80% of that of the base and the maximum reaches 88.5% when referring to the weld with preplaced FeCoNiCrMn powder. Cleavage fractography was observed in the welds. The finding of this work will service the engineering practices of high-entropy alloys.

Re-Melting Behaviour and Wear Resistance of Vanadium Carbide Precipitating Cr27.5Co14Fe22Mo22Ni11.65V2.85 High Entropy Alloy

“…The basic weldability of HEA is currently been seen as good with different welding processes [ 17 , 19 , 20 ]. Especially, for the CrCoFeMnNi basis the welding with laser or friction stir welding has been successfully performed [ 21 , 22 ]. The change in one alloying element in the concept can change its properties.…”