Revista de Chimie (Rev. Chim.), Year 2013, Volume 64, Issue 12,
Ionelia Voiculescu, Victor Geanta, Radu Stefanoiu*, Delia Patroi, Horia Binchiciu Influence of the Chemical Composition on the Microstructure and Microhardness of AlCrFeCoNi High Entropy Alloy
Abstract:
The high entropy alloys (HEA) have much higher entropy of mixing, at atomic scale, than traditional alloys in liquid state or random solid solution state. Recent developments in the field of high-entropy alloys have revealed that they have versatile properties like: ductility, toughness, hardness and corrosion resistance. In the paper are presented some results regarding the effect of chemical composition variation (Nickel content increasing) on the microstructure and microhardness of high entropy alloys from AlCrFeCoNi system. It was found that by increasing the Nickel content the microhardness values have decreased, but have been achieved high values of plasticity and the homogeneity of the solid solution has been improved. By applying heat treatments, it can be obtained different pairs of hardness and plasticity, depending on the dedicated application. Keywords: high entropy alloy, chemical composition, Nickel, microstructure, microhardness
