Tribological behaviour of the double FeCoNiCrCu_x middle-entropy alloy coatings

Abstract

In the present research, the double FeCoCrNiCu x medium-entropy alloy coatings were manufactured on Cr12MoV die steel by laser cladding technology. The cross-section, microstructure, phase, micro-hardness, and tribological behaviour of the coatings were investigated systemically. The dilution effect of the substrate had the weaker effect on the second layer compared to the first layer. The double FeCoCrNiCu x cladding layers only had a single face-centred cubic phase led to the lower micro-hardness and wear resistance. The different atomic radius of the alloying elements in the coatings generated a large lattice dislocation. The face-centred cubic structure of coatings had a higher hardness than that of the traditional face-centred cubic structure. The Cu element is easy to segregate at the grain boundaries to form the Cu-rich solid solution.

A Cost-Effective, Nanoporous, High-Entropy Oxide Electrode for Electrocatalytic Water Splitting

“…Then, we selected four cost-effective, earth-abundant elements: Ni, Co, Fe, and Cr. Although they are widely used in HEA applications [33][34][35][36], to our knowledge, applying this combination of HEOs in energy applications (i.e., water electrolysis) has not received much attention. Accordingly, in this study, we investigated their physical and electrochemical properties after making thin-film electrodes using the drop-casting method.…”

Microstructure and Mechanical Properties of Ni-Based Alloy Composite Coating on Cr12MoV by Laser Cladding

“…Laser surface treatment stands out among many surface-modification technologies because of its short processing time, flexible operation, and high accuracy [8]. In recent years, a series of laser surface treatments have been carried out on Cr12MoV to improve its performance [9][10][11][12][13][14].…”

Fabrication of PtIrPd Noble Metal Medium Entropy Alloy Thin Film by Atomic Layer Deposition

“…[13] Alloys with ΔS mix < 1 R, 1 R < ΔS mix < 1.5 R, and ΔS mix > 1.5 R are defined as low entropy alloy, MEA, and HEAs, respectively, each of which shows unique physical and chemical properties. [14][15][16][17][18][19][20][21] As the intermediate state between low entropy alloy and HEA, MEA possesses the key advantages of both systems: it is much easier to be achieved in form of a single-phase solid solution while retaining the lattice distortion and synergetic effects without phase separation. [22] The improved properties, especially superior mechanical performances brought by the microstructure of MEA have been widely reported in recent years.…”