Dry‐Sliding Wear Response of MoTaWNbV High Entropy Alloy

Abstract

was examined. The alloy's wear response was tested under different experimental conditions. With the use of a metallic ball as a counter body partner, the morphology of the wear track and the presence of Fe oxides controlled the wear rate. When using a ceramic ball for the same sliding distances, similar observations were made regarding the width of the wear tracks and the reduction of the friction coefficient with an increase of the sliding distance. The examination of the debris further explained the wear mechanisms in every case. Finally, by comparing the wear response of Mo 20 Ta 20 W 20 Nb 20 V 20 with that of a commercial super alloy, the improved behavior of the High Entropy Alloy was highlighted in all cases.

Microstructure and Corrosion Performance of Aluminium Matrix Composites Reinforced with Refractory High-Entropy Alloy Particulates

“…It should be mentioned that MoTaNbVW was one of the pio tory HEAs that has been developed and it meets the prerequisites of simple formation. A thorough evaluation of the microstructure of MoTaNbVW c previous efforts [50,51]. Figure 2 presents the X-ray diffractograms for the different materials produced in the present effort.…”

“…MoTaNbVW reinforcement has been produced by vacuum arc melting. Details on the fabrication route and attained microstructures can be found elsewhere [48][49][50][51]. Afterwards, HEA samples were crushed into fine particles using a planetary mill (Fritsch Pulverisette 7 Premium Line, Idar-Oberstein, Germany).…”

Tribological Properties of High-Entropy Alloys under Dry Conditions for a Wide Temperature Range—A Review

“…In each of these methods, the force applied by the pin or block, the speed of movement, and the total distance or time ran are controlled and have an influence on the outcome. One study considered the effects of different speeds [ 40 ], others experimented with different loads [ 27 , 32 , 41 ], and some ran the test for various distances [ 42 , 43 , 44 ]. The most common counter body materials used for the tribological testing were ceramic materials, including silicon nitride (Si 3 N 4 ) and alumina (Al 2 O 3 ), followed by various steels, including SKH51, 100Cr6, and GCR15.…”

“…The most common counter body materials used for the tribological testing were ceramic materials, including silicon nitride (Si 3 N 4 ) and alumina (Al 2 O 3 ), followed by various steels, including SKH51, 100Cr6, and GCR15. Most publications only used one counter body material, but a few compared ceramic and steel materials [ 42 , 43 , 44 , 45 , 46 ]. When testing the Cantor alloy against both materials, wear rates were lower for ceramic counter bodies [ 45 , 46 ].…”

Development and characterisation of new high entropy alloy systems of dual and/or multiple phases

“…In terms of the wear behaviour of refractory high-entropy alloys the studies available in the literature are even more limited. Some indicative works are those of Poulia et al [161] and Mathiou et al [162] In general the alloys, exhibited an excellent wear behaviour that was significantly improved compared to the commercial Inconel 718 Ni superalloy. Another study of a refractory high entropy alloy concerning its wear response was further conducted by the same research team.…”