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Peculiarities of the diffusion of carbon in iron

  • Theory of Heat Treatment
  • Published:
Metal Science and Heat Treatment of Metals Aims and scope

Conclusions

  1. 1.

    Diffusion of carbon inα andγ-irons is non-uniform: at 550 to 950°C, carbon enriches preferentially the grain boundaries; the diffusivity of carbon along grain boundaries of ferrite is three to four higher than inside the grain. An enrichment with carbon of theα-solid solution is also observed in regions adjoining the grain boundaries.

  2. 2.

    The diffusion rate and the distribution of carbon within a single grain are changed by alloying. Addition of substantial amounts of certain elements curtailing theγ loop considerably increases the penetration depth of carbon on account of boundary diffusion developing inγ-iron. The concentration gradient of carbon between boundary and interior of a grain is less in alloyed than in unalloyed iron.

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References

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Authors
  1. S. Z. Bokshtein
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  2. M. A. Gubareva
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  3. I. E. Kontorovich
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  4. L. M. Moroz
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Bokshtein, S.Z., Gubareva, M.A., Kontorovich, I.E. et al. Peculiarities of the diffusion of carbon in iron. Met Sci Heat Treat 3, 6–9 (1961). https://doi.org/10.1007/BF00815232

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