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Coarsening resistance of M2C carbides in secondary hardening steels: Part II. Alloy design aided by a thermochemical database

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Abstract

In high Co-Ni steels containing the strong carbide-forming elements Mo, Cr, and W, secondary hardening is accomplished by the precipitation of fine-scale M2C alloy carbides. Thermodynamic stability and coarsening resistance of these carbides depend on the alloy content of these elements. A model for the M2C coarsening kinetics in multicomponent alloys has been used to identify the optimum alloying addition for maximum coarsening resistance and as a basis for selection of four experimental alloy steels. Necessary information pertaining to the equilibrium in these steels was obtained using the Thermo-Calc software and database developed at the Royal Institute of Technology, Stockholm, Sweden.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 305-701, Taejon, Korea

    Hyuck Mo Lee (Assistant Professor)

  2. Center for Materials Science and Engineering, Massachusetts Institute of Technology, 02139, Cambridge, MA

    Samuel M. Allen (Associate Professor)

  3. Department of Mechanical Engineering, Clemson University, 29631, Clemson, SC

    Mica Grujicic (Assistant Professor)

Authors
  1. Hyuck Mo Lee
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  2. Samuel M. Allen
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  3. Mica Grujicic
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Lee, H.M., Allen, S.M. & Grujicic, M. Coarsening resistance of M2C carbides in secondary hardening steels: Part II. Alloy design aided by a thermochemical database. Metall Trans A 22, 2869–2876 (1991). https://doi.org/10.1007/BF02650248

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  • DOI: https://doi.org/10.1007/BF02650248

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