Effect of initial ausferrite structure on the activation energy of stage II during austempering of ADI

Acta Materialia / Scripta materialia 38 pp. 1281-1287 , 1998.


In the present work the influence of previous ausferrite microstructure of an alloyed ductile iron (0.6%Ni, 0.15%Mo) on the empirical activation energy of stage II is studied. This activation energy was determined making use of the non-isotermal diatometric technique proposed by Mittemeijet et al.