Microstructural evolution and mechanical properties of AlCrFeNiCoC high entropy alloy produced via spark plasma sintering

ABSTRACT

AlCrFeCoC high entropy alloy was synthesised through mechanical alloying and spark plasma sintering. The milling time had a strong influence on the particles shape and structure and consequently on microstructural and mechanical evolution of the material after sintering. The material's microstructure after spark plasma sintering contained FCC and BCC phases as well as ordered BCC and C₂₃C₆ carbide. The material's strength increased with increasing the milling time because of the finer microstructure and phases formation evolution.

KEYWORDS:

• HEA
• SPS
• phase transformation
• mechanical properties

Disclosure statement

No potential conflict of interest was reported by the authors.

Notes on contributors

Armin Emamifar is a doctoral student in the Department of Mechanical Engineering at Ayatollah Boroujerdi University, Iran. He is working on the high entropy alloys. He is author of over 3 papers in International Journals.

Behzad Sadeghi is a postdoctoral researcher in the State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University, Shanghai. He obtained his doctoral degree from Isfahan University of Technology, Iran, under supervision of prof. Morteza Shamanian and advisor prof. Pasquale Cavaliere. His research is mainly focused on nanostructured materials, flake powder metallurgy, spark plasma sintering (SPD), microstructure characterization, mechanical properties, physical properties of metal matrix composites especially CNT/Al nanocomposites. His research also extended to the investigations on friction stir welding microstructure and mechanical behaviors of aluminum alloys. He has published over 30 papers in the field of aluminum matrix composites.

Pasquale Cavaliere research interests focus on Nanostructuredmaterials, Coatings technology, Powder metallurgy, Iron making and steelmaking processes. He is author ofmore than 100 papers in International Journals.

Hosein Ziaei is a master of science (MSc) in Materials science and engineering at Isfahan University of Technology. His research interests focus on high entropy alloys and friction stir welding. He is author of over 2 papers in International Journals.