Evaluation of microstructural and corrosion resistance of as-cast Cu₄₅Mn₂₅Al₁₅Fe₅Cr₅Ni₅ high entropy alloy

Abstract

Cu 45 Mn 25 Al 15 Fe 5 Cr 5 Ni 5 high entropy alloy was prepared using casting route. Detailed microstructural analysis revealed the formation of dendritic structure in the as-cast sample. The results showed that the dendrite (DR) regions are riched with Cu and Mn, while the inter-dendrite (ID) regions are riched with Cr and Fe. Metallographic investigation was conducted using optical microscope and scanning electron microscope as well. Determination of phase analysis was carried out using x-ray diffraction. Corrosion properties were studied via Auto LAB PGSTAT 302N, supplied with Nova software. The investigated alloy demonstrates superior corrosion resistance with average corrosion rate 0.056 mm year −1 .

СТРУКТУРА ТА КОРОЗІЙНО–ЕЛЕКТРОХІМІЧНІ ВЛАСТИВОСТІ ШВИДКОЗАГАРТОВАНИХ ВИСОКОЕНТРОПІЙНИХ СПЛАВІВ Fe5CrCuNiMnSi ТА Fe5CоCuNiMnSi

“…[1][2][3][4][5][6][7]. Завдяки високій твердості та зносостійкості, стійкості до іонізуючих випромінювань, антибактеріальним властивостям та корозійній стійкості, високоентропійні сплави є перспективними матеріалами для різних галузей техніки [8][9][10][11][12][13][14][15][16][17].…”

Comparative Studies of Cr/Ti Additions for Cu40Mn25Al20Fe5Ni5 HEA on Microstructure and Corrosion Behavior in HNO3 Solution

“…15 As cast Cu 45 Mn 25 Al 15 Fe 5 Cr 5 Ni 5 HEA has good corrosion behavior in 3% NaCl solution by avoiding of intermetallic formation of Al-Ni compounds. 16 Minimizing segregation enhances the corrosion behavior such as adding Cr. 16 The Ti addition contains BCC structure on AlCoCrFeNiTi x which has good mechanical properties.…”

“…16 Minimizing segregation enhances the corrosion behavior such as adding Cr. 16 The Ti addition contains BCC structure on AlCoCrFeNiTi x which has good mechanical properties. 17 The addition of Cu to FeCo-NiCrCu x HEA increases the localized corrosion because of Cu-rich interdendritic and Cu-depleted dendrite formation.…”

The effect of cooling rate on structure and corrosion resistance of Fe5CrCuNiMnSi and Fe5CоCuNiMnSi high-entropy alloys

“…There are high-entropy alloys with a structure based on solid solutions, mixtures of intermetallic phases, amorphous phases as well as alloys with a complex multiphase structure [1][2][3][4][5][6][7]. Due to their high hardness and wear resistance, resistance to ionizing radiation, antibacterial properties, and corrosion resistance, high-entropy alloys are promising materials for various fields of technology [8][9][10][11][12][13][14][15][16][17]. Recently, it has been proposed in the literature to consider as HEAs only equimolar alloys, the structure of which contains only simple solid solutions with BCC and FCC crystal lattices.…”