Impact of tungsten on phase evolution in nanocrystalline AlCuCrFeMnWx (x  =  0, 0.05, 0.1 and 0.5 mol) high entropy alloys. (16th November 2017)

• Record Type: Journal Article
• Authors: Kumar, Devesh; Maulik, Ornov; Kumar, Saurav; Sharma, V K; Prasad, Y V S S; Kumar, Vinod
• Is Part Of: Materials research express. Volume 4:Number 11(2017)
• Publication Date: 2017-11-16
• Subjects: high entropy alloy -- nanocrystalline -- diffraction -- mechanical alloying -- Morphology; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aa96df
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: The present study describes the synthesis and preliminary characterization of a novel nanocrystalline AlCuCrFeMnW x ( x = 0, 0.05, 0.1 and 0.5 mol) high entropy alloy (HEA) powders via mechanical alloying (MA). During MA, the formation of a supersaturated solid solution with the formation major BCC 1 and BCC 2 phase with minor FCC fraction in AlCuCrFeMnW x ( x = 0, 0.05, 0.1 and 0.5 mol) HEAs. The average crystallite size of all HEA powder samples after 20 h of milling was less than 20 nm as determined by using Debye–Scherrer formula. The particle morphology and composition of present HEAs were investigated utilizing scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). TEM–SAED analysis of AlCuCrFeMnW x ( x = 0, 0.05, 0.1 and 0.5 mol) HEAs concurred with XRD results. Phase and thermodynamical properties have been correlated in the case of AlCuCrFeMnW x ( x = 0, 0.05, 0.1 and 0.5 mol) high entropy alloys. Differential scanning calorimetric (DSC) of these alloys suggested that there is no significant phase change occur up to 1000 °C.