A novel high-entropy alloy coating on Ti-6Al-4V substrate by laser cladding

•Laser clad TiZrAlNbCo HEAs coatings are prepared on TC4 substrate.•High microhardness and excellent corrosion resistance are obtained.•Corrosion resistance is improved by thinner and denser FCC passivation film. TiZrAlNb and TiZrAlNbCo high-entropy alloys coatings are deposited by laser cladding on...

Full description

Saved in:
Bibliographic Details
Published in:Materials letters 2022-02, Vol.308, p.131131, Article 131131
Main Authors: Jiang, X.J., Wang, S.Z., Fu, H., Chen, G.Y., Ran, Q.X., Wang, S.Q., Han, R.H.
Format: Article
Language:English
Subjects:
Alloys
Body centered cubic lattice
Coating
Coatings
Corrosion
Corrosion resistance
Dendritic structure
Entropy
Face centered cubic lattice
Hardness
High entropy alloys
Intermetallic compounds
Laser beam cladding
Laser cladding
Materials science
Microstructure
Optimization
Substrates
Titanium base alloys
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Laser clad TiZrAlNbCo HEAs coatings are prepared on TC4 substrate.•High microhardness and excellent corrosion resistance are obtained.•Corrosion resistance is improved by thinner and denser FCC passivation film. TiZrAlNb and TiZrAlNbCo high-entropy alloys coatings are deposited by laser cladding on Ti-6Al-4V (TC4) alloy. The microstructure, hardness and corrosion resistance are studied. The results show that TiZrAlNb and TiZrAlNbCo high-entropy alloys coatings are BCC and BCC-FCC Matrix phases, respectively, accompanied by a small number of intermetallic compounds. The dendrite of TiZrAlNbCo alloy coating is much finer than that of TiZrAlNb alloy coating. Compared with TC4 substrate and TiZrAlNb alloy coating, TiZrAlNbCo alloy coating possesses high hardness of 768.944HV and excellent corrosion resistance (the Icorr is 3.66 × 10−9 A/cm2). The fundamental cause of microstructure optimization and performance improvement is the appearance of FCC phase in TiZrAlNbCo alloy coating.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.131131