Effect of Ti content on structure and properties of Al2CrFeNiCoCuTix high-entropy alloy coatings

•Al2CrFeNiCoCuTix high-entropy alloy coatings were prepared by laser cladding.•Al2CrFeNiCoCuTix coatings show excellent corrosion resistance and wear resistance.•Al2CrFeNiCoCuTix coatings play a good protective effect on Q235 steel.•Ti element promotes the formation of a BCC structure in a certain e...

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Bibliographic Details
Published in:	Journal of alloys and compounds Vol. 585; pp. 282 - 286
Main Authors:	Qiu, X.W., Zhang, Y.P., Liu, C.G.
Format:	Journal Article
Language:	English
Published:	Kidlington Elsevier B.V 01-02-2014 Elsevier
Subjects:	Al2CrFeNiCoCuTix Alloy steels Applied sciences Cladding Coatings Condensed matter: electronic structure, electrical, magnetic, and optical properties Corrosion resistance Domain effects, magnetization curves, and hysteresis Exact sciences and technology High-entropy alloy Killed steels Laser cladding Magnetic properties and materials Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects Metals. Metallurgy Microstructure Physics Production techniques Protective coatings Structural steels Surface treatment Titanium Wear resistance Corrosion resistance Wear resistance Laser cladding Microstructure Al2CrFeNiCoCuTix High-entropy alloy high entropy alloy Scanning electron microscopy Vickers hardness Magnetization Equiaxed structure Magnetic hysteresis Al Soft magnetic materials X ray diffraction Microhardness Metal coating BCC lattices Laves phase CrFeNiCoCuTi Heat affected zone
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Summary:	•Al2CrFeNiCoCuTix high-entropy alloy coatings were prepared by laser cladding.•Al2CrFeNiCoCuTix coatings show excellent corrosion resistance and wear resistance.•Al2CrFeNiCoCuTix coatings play a good protective effect on Q235 steel.•Ti element promotes the formation of a BCC structure in a certain extent. The Al2CrFeNiCoCuTix high-entropy alloy coatings were prepared by laser cladding. The structure, hardness, corrosion resistance, wear resistance and magnetic property were studied by metallurgical microscope, scanning electron microscopy with spectroscopy (SEM/EDS), X-ray diffraction, micro/Vickers hardness tester, electrochemical workstation tribometer and multi-physical tester. The result shows that, Al2CrFeNiCoCuTix high-entropy alloy samples consist of the cladding zone, bounding zone, heat affected zone and substrate zone. The bonding between the cladding layer and the substrate of a good combination; the cladding zone is composed mainly of equiaxed grains and columnar crystal; the phase structure of Al2CrFeNiCoCuTix high-entropy alloy coatings simple for FCC, BCC and Laves phase due to high-entropy affect. Ti element promotes the formation of a BCC structure in a certain extent. Compared with Q235 steel, the free-corrosion current density of Al2CrFeNiCoCuTix high-entropy alloy coatings is reduced by 1–2 orders of magnitude, the free-corrosion potential is more “positive”. With the increasing of Ti content, the corrosion resistance of Al2CrFeCoCuNiTix high-entropy alloy coatings enhanced in 0.5mol/L HNO3 solution. Compared with Q235 steel, the relative wear resistance of Al2CrFeCoCuNiTix high-entropy alloy coatings has improved greatly; both the hardness and plasticity are affecting wear resistance. Magnetization loop shows that, Ti0.0 high-entropy alloy is a kind of soft magnetic materials.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0925-8388 1873-4669
DOI:	10.1016/j.jallcom.2013.09.083