Abstract

KANYANE, L. R.; MALATJI, N.  and  POPOOLA, A. P. I.. Heat-treatment (Annealing) Effect on the Mechanical and Electrochemical Performance of a Synthesized AlCrFeMnNiV Equi-atomic High Entropy Alloy (HEA) via Arc-melting and Casting Technologies. Port. Electrochim. Acta [online]. 2022, vol.40, n.5, pp.337-346.  Epub Aug 31, 2022. ISSN 0872-1904.  https://doi.org/10.4152/pea.2022400502.

In this work, an equi-atomic AlCrFeMnNiV HEA was synthesized by means of arc-melting and casting processes. The casted alloy ingots were heat-treated (annealed) at temperatures of 400, 600 and 800 ºC, for 2 h. The effect of the heat-treatment temperature on the HEA microstructural evolution, compressive strength and corrosion behavior was investigated. Heat-treatment temperatures of 400 and 600 ºC resulted in increased micro-hardness properties that, at 800 ºC, were drastically reduced, although a good combination between strength and ductility was observed. HEA showed an extreme decrease in the current density (J (A/cm2)), after the heat-treatment, with a lower potential (V). The heat-treated HEA demonstrated a good corrosion rate in acidic conditions, as compared to that of nickel (Ni) based, titanium (Ti) alloys and stainless steel (SS) super alloys.

Keywords : HEA; AlCrFeMnNiV; arc-melting; casting; heat-treatment (annealing); compression and corrosion.

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