Preparation of CoCrFeNiCuMnSi_x High Entropy Alloys and their Microstructure and Properties

Abstract:

According to the design concept of multi-element high-entropy alloys, seven kinds of elements (Cr, Mn, Fe, Co, Ni, Cu and Si) were selected in this work to design a series of CoCrFeNiCuMnSi_x high entropy alloys. Metal power was melted by vacuum arc furnace. Cast microstructure and phase structure of the high entropy alloy were Characterized by optical microscope (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD). And then, hardness, wear resistance and corrosion resistance were tested. Phase structure of cast microstructure, the morphology of the microstructure and mechanical properties of the CoCrFeNiCuMnSi_x high entropy alloys were researched systematic in the condition of different content Si. The results show that the crystal structure is simple BCC structure. With the increasing Si content, the alloy cast structure changes from dendrite morphology to cellular morphology. It was Si content that plays an important role in increasing significantly the hardness of the alloy. The hardness of the maximum value reaches to HV985.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 615-618
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.615
• Online since: August 2013
• Authors: Li Sheng Zhang
• Keywords: Hardness, High Entropy Alloys (HEAs), Vacuum Arc Furnace

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