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Microstructural development in non-oriented lamination steels

Part 2 Isothermal transformation studies

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Abstract

The isothermal decomposition of austenite in two commercial low carbon (0.04 w/o) steels has been examined using scanning electron microscopy and transmission electron microscopy. Particular emphasis has been placed on analysing the pearlite reaction and the development of massive films of cementite at pro-eutectoid ferrite/pearlite interfaces. Similarly, grain boundary precipitation of cementite has been investigated. The results strongly support the contention that films of cementite at ferrite/pearlite interfaces form predominantly by a coarsening process. In addition, it is shown that grain boundary precipitation of cementite can occur from super-saturated ferrite or from the decomposition of austenite. Examination of the early stages of the pearlite reaction has provided evidence that multiple nucleation of cementite can be a necessary precursor to the development of a pearlite colony.

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References

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Author notes

  1. J. -W. Lee

    Present address: Department of Metallurgical Engineering and Materials Science, Carnegie-Mellon University, 15213, PA, USA

  2. S. W. Thompson

    Present address: Advanced Steel Processing and Products Research Center, Department of Metallurgical and Materials Engineering, Colorado School of Mines, 80401, CO, USA

Authors and Affiliations

  1. Department of Materials Science and Engineering, The Pennsylvania State University, 16802, University Park, PA, USA

    J. -W. Lee, S. W. Thompson & P. R. Howell

Authors
  1. J. -W. Lee
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  2. S. W. Thompson
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  3. P. R. Howell
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Lee, J.W., Thompson, S.W. & Howell, P.R. Microstructural development in non-oriented lamination steels. J Mater Sci 25, 1699–1710 (1990). https://doi.org/10.1007/BF01045373

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  • DOI: https://doi.org/10.1007/BF01045373

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