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The effect of phosphorus segregation on the intermediate-temperature embrittlement of ferritic, spheroidal graphite cast iron

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Abstract

The objective of this article is to study the effect of phosphorus segregation on the fracture modes of the intermediate-temperature intergranular embrittlement which occur in ferritic, spheroidal graphite cast iron. The specimens were quenched from 820 °C and 500 °C during the furnace-cooling period of ferritization annealing in order to vary the degree of phosphorus segregation, then deformed in tension at various temperatures between 20 °C and 520 °C with a constant crosshead speed of 0.01 mm/s. These two kinds of specimens were also fractured by impact at about -50 °C in the vacuum chamber of a scanning Auger microscope in order to analyze the phosphorus segregation and compare the fracture modes. The results show that the fracture mode of the intermediate-temperature embrittlement is influenced by the history of heat treatment prior to tension. When the specimens were held at 500 °C and quenched from this temperature, the fracture was intergranular. However, the specimens quenched from 820 °C revealed cleavage fracture with cracks propagating radially from a central region with magnesium-rich particles. Identified by transmission electron microscopy (TEM), the particles were MgO. Grain-boundary segregation of phosphorus in the specimen held at 500 °C was confirmed by Auger analysis of the impact fracture surface. Segregation of phosphorus must play an important role in the fracture mode of the intermediate-temperature intergranular embrittlement.

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References

  1. O. Yanagisawa and T.S. Lui:Trans. Jpn. Inst. Met., 1983, vol. 24, pp. 858–67.

    Google Scholar 

  2. O. Yanagisawa and T.S. Lui:Metall. Trans. A, 1985, vol. 16A, pp. 667–73.

    CAS  Google Scholar 

  3. R.N. Wright and T.R. Farrell:AFS Trans., 1985, vol. 93, pp. 853–66.

    CAS  Google Scholar 

  4. C.G. Chao, T.S. Lui, and M.H. Hon:Metall. Trans. A, 1988, vol. 19A, pp. 1213–19.

    CAS  Google Scholar 

  5. C.G. Chao, T.S. Lui, and M.H. Hon:Metall. Trans. A, 1989, vol. 20A, pp. 431–36.

    CAS  Google Scholar 

  6. T.S. Lui: Ph.D. Thesis, Hiroshima University, Hiroshima, Japan, 1984.

    Google Scholar 

  7. G.N.J. Gilbert:AFS Trans., 1957, vol. 65, pp. 49–65.

    Google Scholar 

  8. G. Dinges and W.E. uver, Jr.:AFS Trans., 1966, vol. 74, pp. 437–49.

    Google Scholar 

  9. C. Bak, M. Degois, and J.M. Schissler:AFS Trans., 1980, vol. 88, pp. 301–12.

    CAS  Google Scholar 

  10. S.I. Karsay:Ductile Iron, 3rd ed., Quebec Iron & Titanium Corporation, Canada, 1985, pp. 52–55.

    Google Scholar 

  11. T. Kusakawa, A. Ogame, X. Xu, and H. Lin: inThe Physical Metallurgy of Cast Iron, Materials Research Society Symposium Proceedings, H. Fredriksson and M. Hillert, eds., Materials Research Society, Pittsburgh, PA, 1985, vol. 34, pp. 109–17.

    Google Scholar 

  12. T. Matsuyama and H. Suto:Trans. Jpn. Inst. Met., 1979, vol. 20, pp. 44–50.

    CAS  Google Scholar 

  13. H. Erhart and H.J. Grabke:Met. Sci., 1981, vol. 15, pp. 401–08.

    Article  CAS  Google Scholar 

Download references

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Authors and Affiliations

  1. Department of Materials Science and Engineering, National Cheng Kung University, 70101, Tainan, Taiwan, Republic of China

    S. F. Chen (Graduate Student), T. S. Lui (Professor) & L. H. Chen (Professor)

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  1. S. F. Chen
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  2. T. S. Lui
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  3. L. H. Chen
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Chen, S.F., Lui, T.S. & Chen, L.H. The effect of phosphorus segregation on the intermediate-temperature embrittlement of ferritic, spheroidal graphite cast iron. Metall Mater Trans A 25, 557–561 (1994). https://doi.org/10.1007/BF02651597

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