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Fracture Micromechanisms Evaluation of High-Strength Cast Irons Under Thermomechanical Fatigue Conditions

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Abstract

The truck industry has constantly searched to increase the performance of heavy-duty diesel vehicles, either by reducing weight and the size of the engines, or by increasing their power. In this sense, higher strength grades of cast iron have been developed and tested under thermomechanical conditions, and the results have been positive, since life under such conditions has increased significantly. The purpose of this paper was to shed some light on the fracture micromechanisms acting during crack nucleation and growth under thermomechanical loading conditions, in two cast iron types for use in cylinder head manufacturing, namely gray iron grade 300 (GI 300) and compacted graphite iron grade 500 (CGI 500). The results were compared with those from the standard grades GI 250 and CGI 450. In both gray and compacted graphite irons, fractographic examination showed that the crack starts at graphite tips, grows through the graphite skeleton inside a eutectic cell, and progresses by the coalescence of multiple fatigue cracks from one eutectic cell to another, fracturing the matrix at eutectic cell boundaries. In CGI 500, the graphite in eutectic cells ended with a change in the graphite shape, from vermicular to a round shape end. This brings additional difficulties for the crack propagation process, and, together with the rough interface graphite/matrix and with the thick eutectic cell boundaries, it explains the outstanding thermomechanical results with the CGI 500.

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References

  1. S. Trampert, T.G. Gocmez, S. Pischinger, J. Eng. Gas Turbines Power 130(1), 1–10 (2008)

    Article  Google Scholar 

  2. W. L. Guesser, L.C Guedes. The new generation of engines and the challenges for the foundry industry. AEA SIMEA, São Paulo, Brasil, 2016. http://www.proceedings.blucher.com.br/article-details/the-new-generationof-engines-and-the-challenges-for-the-foundry-industry-23721. Accessed 26 June 2019

  3. A. Bignonnet, E. Charkaluk, Thermomechanical fatigue in the automotive industry. Eur. Struct. Integr. Soc. 29, 319–330 (2002)

    Article  CAS  Google Scholar 

  4. D. Löhe, B. Tilmann, K.H. Lang. 5th International Conference on Low Cycle Fatigue. (Berlin, 2003), pp 161–176

  5. T. Seifert, H. Riedel, Int. J. Fatigue 32(8), 1358–1367 (2010)

    Article  CAS  Google Scholar 

  6. S. Ghodrat, A.C. Riemslag, L.A.I. Kestens, R.H. Petrov, M. Janssen, J. Sietsma, Metall. Mater. Trans. A 44(5), 2121–2213 (2013)

    Article  Google Scholar 

  7. V.L. Diaconu, T. Sjögren, P. Skoglund, A. Diószegi, Stress relaxation of compacted graphite iron alloyed with molybdenum. Int. J. Cast Met. Res. 26(1), 51–57 (2013)

    Article  CAS  Google Scholar 

  8. R.T. Wimber, AFS Trans. 88, 717–726 (1980)

    CAS  Google Scholar 

  9. M. H. Ferreira. Análise da vida em fadiga termomecânica de ferros fundidos cinzento e vermicular. Master Thesis, Universidade de São Paulo, São Carlos, 2017. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-05092017-081625/pt-br.php

  10. F. Langmayr, F. Zieher, F.M. Lampic, MTZ 4, 298–304 (2004)

    Google Scholar 

  11. P. Skoglund, J. Elfsberg, N. Ipek, L.V. Diaconu, M. Larsson, P. Schmidt, Mater. Sci. Forum 925, 377–384 (2018)

    Article  Google Scholar 

  12. S. Ghodrat. Thermo-Mechanical Fatigue of Compacted Graphite Iron in Diesel Engine Components. Ph.D. Thesis, Delf University of Technology (2013)

  13. W.L. Guesser, L.C. Guedes, A.L. Müller, V.B. Demetrio, A. Rabelo, Mater. Sci. Forum 925, 296–303 (2018)

    Article  Google Scholar 

  14. V. Norman, P. Skoglund, J. Moverare, Int. J. Cast Met. Res. 29(1–2), 26–33 (2015)

    Google Scholar 

  15. V. Norman, P. Skoglund, D. Leidemark, J. Moverare, Int. J. Fatigue 88, 121–131 (2016)

    Article  CAS  Google Scholar 

  16. H. Pirgazi, S. Ghodrat, L.A.I. Kestens, Mater. Charact. 90, 13–20 (2014)

    Article  CAS  Google Scholar 

Download references

Acknowledgements

This paper is an invited submission to IJMC selected from presentations at the 2nd Carl Loper 2019 Cast Iron Symposium held from September 30 to October 1, 2019, in Bilbao, Spain. The authors would like to thank Tupy Foundry for the financial support and for providing the materials. Two of the authors give thanks to Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq, Brasil (Proc. 306388/2017-0 and Proc. 314941/2018-5).

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Authors and Affiliations

  1. São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil

    Douglas G. Bon, Marcio Henrique Ferreira & Waldek Wladimir Bose Filho

  2. Santa Catarina State University, Joinville, SC, Brazil

    Wilson Luiz Guesser

  3. Foundry Consultant at Tupy Foundry, Joinville, SC, Brazil

    Wilson Luiz Guesser

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  1. Douglas G. Bon
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  2. Marcio Henrique Ferreira
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  3. Waldek Wladimir Bose Filho
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  4. Wilson Luiz Guesser
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Correspondence to Wilson Luiz Guesser.

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Bon, D.G., Ferreira, M.H., Bose Filho, W.W. et al. Fracture Micromechanisms Evaluation of High-Strength Cast Irons Under Thermomechanical Fatigue Conditions. Inter Metalcast 14, 696–705 (2020). https://doi.org/10.1007/s40962-019-00399-w

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