The effect of plastic deformation on the transformation of austenite to acicular ferrite in a Fe-Mn-Si-C alloy steel containing non-metallic inclusions was investigated. The transformation to acicular ferrite is retarded and the final fraction of acicular ferrite is reduced in plastically deformed austenite, which is a characteristic of a displacive transformation mechanism. The increase in the chemical driving force for transformation due to large undercooling below the B-s temperature overcomes the efficacy of dislocations in preventing the growth of acicular ferrite.
Materials Science and Engineering A, Vol. 360A, 2003, pp. 249-257.
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