presence of polygonal B2 precipitates in FCC matrix and GBs and that of (ii) B2 stringers in FCC matrix . Besides, the influence of B2 morphology on the strengthening contribution of B2 phase has also been highlighted in Table . 2 ). Comparing the overall yield strength of Fe-15Mn-10Al-5Ni-0.8C and Fe-16Mn-8Al-5Ni-1C (wt.%) steels with the morphologies of B2 phase in the aforementioned steel compositions, it is evident that B2 morphology largely influences the yield strength of B2s Fe-Mn-Al-Ni-C steels. The overall yield strength of these steels may be expressed using the rule of mixtures, as highlighted in Refs. :