Experimental Investigations of the Fe-Mn-Ti System in the Concentration Range of up to 30 at.% Ti

Abstract

The ternary Fe-Mn-Ti system was investigated in the compositional range of up to 30 at.% Ti for temperatures ranging from 1000 °C to the melting temperature. Based on the metallographic investigation of as-cast alloys a partial liquidus projection was constructed, revealing large primary solidifying regions for the phases A1, A2, A12, A13, C14 and Mn4Ti. Isothermal heat treatments at 1000 and 1200 °C revealed wide homogeneity ranges for the Mn-based phases A12 and A13 at Ti contents between 5 and 20 at.% and up to 65 at.% of Fe, indicating an electron-mediated stabilization of both phases for the simultaneous solution of Fe and Ti.