Effect of cobalt content on wear behaviour of Al0.4FeCrNiCox (x = 0, 0.25, 0.5, 1.0 mol) high entropy alloys tested under demineralised water with and without 3.5% NaCl solution. (24th May 2019)

• Record Type: Journal Article
• Authors: Kumar, Saurav; Rani, Pooja; Patnaik, Amar; Pradhan, Ajaya Kumar; Kumar, Vinod
• Is Part Of: Materials research express. Volume 6:Number 8(2019)
• Publication Date: 2019-05-24
• Subjects: high entropy alloy -- hardness -- wear; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ab20b5
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: In the present work, the effect of cobalt content on wear behaviour of Al0.4 FeCrNiCox (x = 0, 0.25, 0.5, 1.0 mol) high entropy alloys is comparatively studied under demineralized water and demineralized water + 3.5% NaCl solution, conditions. With the addition of more amount of cobalt, the microhardness is observed to decrease from 377 HV to 199 HV and the coefficient of friction and the specific wear rate are observed to increases under both the solution conditions. The worn surface is studied using field emission scanning electron microscope, energy dispersive x-ray spectroscopy, and optical profilometer to predict the mode of wear. The wear is found to occur under the combined action of adhesion along with delamination, plastic flow, and oxidation. The x-ray photoelectron spectroscopy results indicate that compound like, Fe2 O3, Cr2 O3, Al2 O3 and Al(OH)3 are formed under DM water condition, and Fe3 O4, Cr2 O3, Al2 O3, Al(OH)3 and FeCl3 are formed under DM + 3.5% NaCl solution condition.