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A Comprehensive Case Study of Macrosegregation in a Steel Ingot

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Abstract

A case study is presented that examines the macrosegregation and grain structure present in a 12-tonne steel ingot, which was cast for experimental purposes. Details of the casting procedure were well documented and the resulting ingot was characterized using a number of techniques that measured chemical segregation, shrinkage, and porosity. The formation of the porosity and segregation patterns is discussed in reference to the particular grain structure observed in the ingot. It is hoped that this case study can be used as a tool for the validation of future macromodels.

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Acknowledgments

This work was undertaken as part of a Project sponsored by Rolls-Royce Power Nuclear plc in collaboration with Sheffield Forgemasters International. The corresponding author would like to thank Prof. Grae Worster and Prof. Christoph Beckermann for very helpful discussions. Requests for access to the underlying research data should be directed to the corresponding author, and will be considered against commercial interests and data protection.

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Authors and Affiliations

  1. Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK

    Ed J. Pickering (Research Associate)

  2. Sheffield Forgemasters RD26 Ltd., Brightside Lane, Sheffield, S9 2RW, UK

    Connor Chesman (Development Technician), Sinan Al-Bermani (Development Engineer), Peter Davies (Development Engineer) & Jesus Talamantes-Silva (Managing Director)

  3. Geotek Ltd., 4 Sopwith Way, Daventry, NN11 8PB, UK

    Melanie Holland (Geochemist)

Authors
  1. Ed J. Pickering
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  2. Connor Chesman
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  3. Sinan Al-Bermani
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  4. Melanie Holland
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  5. Peter Davies
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  6. Jesus Talamantes-Silva
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Corresponding author

Correspondence to Ed J. Pickering.

Additional information

Manuscript submitted April 11, 2015.

Appendix

Appendix

Gray Cast Iron Properties

See Figures 20, 21, and 22.

Fig. 20
figure 20

Thermal conductivity variation with temperature for gray cast iron

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Fig. 21
figure 21

Density variation with temperature for gray cast iron

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Fig. 22
figure 22

Specific heat variation with temperature for gray cast iron

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Ceramic Insulation Properties

Density = 1350 kg m−3 and Specific Heat = 1.0 kJ kg−1 K−1 (See Figure 23).

Fig. 23
figure 23

Thermal conductivity variation with temperature for ceramic insulation

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Packing Sand Properties

Density = 1520 kg m−3 (See Figures 24 and 25).

Fig. 24
figure 24

Thermal conductivity variation with temperature for packing sand

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Fig. 25
figure 25

Specific heat variation with temperature for packing sand

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Pickering, E.J., Chesman, C., Al-Bermani, S. et al. A Comprehensive Case Study of Macrosegregation in a Steel Ingot. Metall Mater Trans B 46, 1860–1874 (2015). https://doi.org/10.1007/s11663-015-0386-y

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