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Identification of dynamic ferrite formed during the deformation of super-cooled austenite by image-based analysis of an EBSD map

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Abstract

Differentiation of dynamically and statically transformed ferrites in SIDT (Strain-Induced Dynamic Transformation) steel was carried out by various image-based analyses of EBSD (Electron BackScattered Diffraction) maps. Various identification methods were tried on the basis on the grain size, and the intra- and inter-granular misorientations. The grain-size-based method was valid only when a bimodal grain size distribution in the ferrite phase, due to the large prior austenite grain size, appeared in the specimen. On the other hand, using the proposed method based on both intra- and inter-granular misorientations, the dynamically transformed ferrite could be effectively extracted from SIDTed steel, even in steel in which the grain sizes of the dynamically and statically transformed ferrites were alike.

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Authors and Affiliations

  1. Department of Materials Science and Engineering and Center for Iron & Steel Research, RIAM, Seoul National University, 599 Gwanak-ro, Seoul, 151-744, Korea

    Yong Min Kim, Tae-Hong Ahn, Kyu Hwan Oh & Heung Nam Han

  2. Plate Research Group, Technical Research Laboratories, POSCO, Goedong-dong 1, Nam-gu, Pohang-si, Gyeongbuk, 790-785, Korea

    Kwang Kyun Park

Authors
  1. Yong Min Kim
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  2. Tae-Hong Ahn
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  3. Kwang Kyun Park
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  4. Kyu Hwan Oh
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  5. Heung Nam Han
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Correspondence to Heung Nam Han.

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Kim, Y.M., Ahn, TH., Park, K.K. et al. Identification of dynamic ferrite formed during the deformation of super-cooled austenite by image-based analysis of an EBSD map. Met. Mater. Int. 17, 181–186 (2011). https://doi.org/10.1007/s12540-011-0401-z

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  • DOI: https://doi.org/10.1007/s12540-011-0401-z

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