| Abstract: | In the present investigation, the influence of morphology and distribution of ferrite, especially the acicular ferrite in Widmansttten structure, on fracture behavior of low-carbon steel 16Mn at low temperature was discussed in detail. The microstructures of polygonal ferrite, intersecting aeicuiar ferrite and parallel aeicular ferrite were obtained by using interrupted-cooling procedure.If the arrangement is characterized by intersecting, the steel would possess the superior toughness at low temperature in comparison with that of polygonal ferrite. If the microstructure is mainly composed of parallel acicular ferrite, however, it would deteriorate the steel toughness. |
