The Dynamics of Phase Transformation and Stability of r Phase for Mn-Al-C Alloy

The dynamics of phase transformation of the ternary alloy which consists of 69.40wt% Mn, 29.86wt%Al, 0.58wt% C, and constant temperature for three types of Mn-Al-C have been researched.The critical temperature of base transformation of the alloys were measured by DTA.It indicated that the transformation temperature for these alloy varied with the different compositions.In the sub-eutectic composition, phase decomposed, γ-Phase precipitated first. But in over-eutectic composition,β-Mn phase precipitated from τ-phase.When the content of C was constant,the stability of τ-phase decreased with the increase of Mn content.