Comparison of interphase boundary structure between bainite and martensite in steel

Interphase boundary structures were compared between lath-shaped bainitic ferrite in Fe-0.6C-2Si-1Mn and lath martensite in Fe-20Ni-5.5Mn. Both laths exhibit the macroscopic habit plane scattered around (1 2 1)gamma which contains monoatomic steps with the (1 1 1)gammaparallel to(0 1 1)alpha terrace (transformation dislocations/structural ledges). Similar accommodation dislocations, with pure-screw characters on (1 1 1)gammaparallel to(0 1 1)alpha, were observed in both cases. (C) 2002. Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.