AlCr2FeCoNiNbx (x=0, 0.5, 1.0, 1.5, 2.0,
x values in molar ratio) high-entropy alloy (HEA)
coatings were fabricated on Q345 steel by laser cladding.
The effects of annealing on microstructure and erosion
wear resistance of the HEA coatings were studied.
These HEA coatings present an erosion characteristic of
ductile materials. With addition of Nb, the Vickers
hardness of AlCr2FeCoNiNbx coatings increases due to
the increase of volume fraction of Laves phase.
Meanwhile, the mass loss rates decreased with the
increase of Nb content. The erosion mechanism evolved
from delamination to micro-ploughing with the Nb
additions at 30° impact angle.