Structural Change in Co–Cr–Fe–Mn–Ni Alloys upon Variation in Mn and Fe Concentrations

Co–Cr–Fe–Mn–Ni alloys with a change in the manganese and iron concentrations from 5 to 35 at % providing the optimum ratio between the strength and ductility have been investigated. Using a comprehensive study of the structure and mechanical properties of the samples, data on the effect of the elemental composition on the micro- and nanohardness of the Co–Cr–Fe–Mn–Ni alloys have been obtained and an optimum Mn-to-Fe ratio ensuring high strength has been determined. The structure and the phase and chemical compositions of the materials have been examined by X-ray diffraction analysis and scanning electron microscopy.