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Materials Processing Fundamentals 2019 pp 73–86Cite as

A New Alloy System Having Autogenous Grain Pinning at High Temperature

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Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

This contribution proposes a new alloy in which a small volume fraction of austenite particles is used to pin ferrite grain growth at high temperatures . During the reheating process, when the temperature is higher than 1200 ℃, the coarsening of austenite particles is driven by volume-diffusion-controlled behaviour and ferrite grain growth is dominated by the pinning effect of austenite particles. At low temperature (<1280 ℃), grain growth occurred at a rate which is proportional to the particle coarsening rate; while at high temperature (>1280 ℃), grain growth is much lower than that expected without pinning. During the solidification process, austenite particles nucleate along ferrite grain boundaries and retard grain growth. Grain growth can be completely arrested with more austenite particle precipitates. This new alloy can be applied to control grain coarsening in the thin slab casting direct rolling process, grain size control in the HAZ of welds and grain growth resistance at high temperature .

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Author information

Authors and Affiliations

  1. Department of Materials Science and Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7, Canada

    Tihe Zhou & Hatem S. Zurob

  2. Department of Materials Science and Engineering, Missouri University of Science and Technology, 1400 N. Bishop Ave, Rolla, MO, 65409-0330, USA

    Ronald J. O’Malley

Authors
  1. Tihe Zhou
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  2. Hatem S. Zurob
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  3. Ronald J. O’Malley
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Corresponding author

Correspondence to Tihe Zhou .

Editor information

Editors and Affiliations

  1. Boston Metal, Woburn, MA, USA

    Guillaume Lambotte

  2. Iowa State University, Ames, IA, USA

    Jonghyun Lee

  3. Massachusetts Institute of Technology, Cambridge, MA, USA

    Antoine Allanore

  4. Massachusetts Institute of Technology, Cambridge, MA, USA

    Samuel Wagstaff

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© 2019 The Minerals, Metals & Materials Society

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Zhou, T., Zurob, H.S., O’Malley, R.J. (2019). A New Alloy System Having Autogenous Grain Pinning at High Temperature. In: Lambotte, G., Lee, J., Allanore, A., Wagstaff, S. (eds) Materials Processing Fundamentals 2019. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05728-2_7

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