Effect of Mn, Al, Ni, and C Content on the Equilibrium Phase Composition of Alloys Based on the Fe-Mn-Al-Ni-C System

摘要

A Thermo-Calc program is used to calculate isothermal and polythermal sections of diagrams and phase composition for alloys of the Fe-Mn-Al, Fe-Mn-Al-Ni, and Fe-Mn-Al-Ni-C systems. Phase diagrams are used to study the effect of nickel, aluminum, manganese, and carbon on the equilibrium structure of alloys of the Fe-Mn-Al-Ni-C system. Concentration ranges are determined for existence of single-phase gamma-alloys in the range 1000-1200 degrees C. It is established that achievement of a considerable aluminum content (10%) and existence of increased specific strength for austenitic alloys of the Fe-Mn-Al-Ni-C system containing not less than 5% Ni is possible with a manganese content of not less than 20% and carbon not less than 1.4%.