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Effects of C and Mn contents on the deformation-enhanced ferrite transformation (DEFT) in low carbon (Mn) steels have been investigated by hot compression. The microstructures of 2-4μm ultra-fine equiaxed ferrite grains with minors distributed ho- mogeneously can be obtained by DEFT in all the tested steels. The more pronounced refinement is achieved as the C or Mn content increasing because of the higher-density nucleating sites and lower growth rate. The effectiveness of C on the level of refinement is more obvious than that of Mn.
Effects of C and Mn contents on the deformation-enhanced ferrite transformation (DEFT) in low carbon (Mn) steels have been investigated by hot compression. The microstructures of 2-4 μm ultra-fine equiaxed ferrite grains with minors distributed ho- mogeneously can be The more pronounced refinement is achieved as the C or Mn content increasing because of the higher-density nucleating sites and the lower growth rate. The effectiveness of C on the level of refinement is more obvious than that of Mn.