EFFECT OF MILLING AGENT (METHANOL) ON PHASE COMPOSITION AND STRUCTURE OF AlCoCrFeNiTi sub( 0.5) HIGH ENTROPY ALLOY POWDERS

• Published in: Materiálové inžinierstvo Vol. 23; no. 1; p. 20
• Main Authors: Moraveik, Igor, Hanusova, Petra, Eupera, Jan, Dlouhy, Ivo
• Format: Journal Article
• Language: English
• Published: 01.01.2016
• Subjects: Alloy development; Alloying elements; Detectors; Entropy; Methyl alcohol; Phase composition; Scanning electron microscopy; Solid solutions
• ISSN: 1335-0803; 1338-6174

In the last decade, high-entropy alloys (multi-principal element alloys) were developed as a new family of materials with high application potential. The effects of anti-agglomeration milling agent on the phase composition, structure, and size of non-equiatomic AlC degree CrFeNiTi0,5 mechanically milled powders were investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) with an energy dispersive spectroscopy (EDS) detector were utilized for microstructural analyses. During mechanical alloying (MA), a supersaturated Cr-based solid solution with BCC structure with significantly reduced grain size was formed after 10 hours of milling. During the annealing of milled powders, this solid solution decomposed into a mixture of four different phases. It was found that the use of milling agent had an extensive influence on the milled powders' properties. Significant differences in phase composition, microstructure, and powder particle size were observed, with more favourable results in the case of milling in the presence of the milling agent.