Abstract
Phase transformations of the Cr-Co-Mn system have been studied using DTA, X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). Liquidus and solidus projections, a melting diagram and Scheil reaction scheme in the whole concentration range have been constructed. Enthalpy of formation of equimolar σ phase was obtained using drop-solution calorimetry. Composition dependency of microhardness for single-phase σ alloys was obtained.
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