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Microstructure and creep behavior of a niobium alloyed cast heat-resistant 26 pct Cr steel

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Abstract

The effects of niobium additions to a “straight chromium” alloy were investigated by optical metallography and creep testing at 1033 K. The results indicate that by increasing the amount of interdendritic constituent, niobium adds to creep strength and fracture ductility. Optimum alloy design requires balancing niobium, chromium, and carbon content.

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Authors and Affiliations

  1. Acos Villares S.A., Av. Dr. Ramos de Azevedo 133, 09500, São Caetano do Sul, SP, Brazil

    Eduardo A. A. G. Ribeiro

  2. Metallurgy Department, Polytechnic School, University of São Paulo and Companhia Brasileira de Metalurgia e Mineracão (CBMM), Av. Juscelino Kubitschek 1703, 04543, São Paulo, SP, Brazil

    R. Papaléo

  3. Companhia Brasileira de Metalurgia e Mineração (CBMM), Avenida Juscelino Kubitschek 1703, 04543, São Paulo, SP, Brazil

    J. R. C. Guimarães

Authors
  1. Eduardo A. A. G. Ribeiro
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  2. R. Papaléo
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  3. J. R. C. Guimarães
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Formerly with the Metallurgy Department, Polytechnic School, University of São Paulo, SP

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Ribeiro, E.A.A.G., Papaléo, R. & Guimarães, J.R.C. Microstructure and creep behavior of a niobium alloyed cast heat-resistant 26 pct Cr steel. Metall Trans A 17, 691–696 (1986). https://doi.org/10.1007/BF02643989

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  • DOI: https://doi.org/10.1007/BF02643989

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