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Microstructure of martensite in chromium-nickel steel

Conclusions

The structure of the martensite in steel of the transition type depends on the conditions under which it was produced: when martensite results from treatment at −70°C there is a predominance of plate-like crystals containing twins. Cooling from high temperature tempering, leads to the formation of needle-like crystals alone without any sign of internal twinning.

The ultimate strength and the yield strength of martensite formed as the result of treatment at −70° are higher.

Stacking defects may be areas of preferential nucleation of martensite crystals and at the same time limit the growth of martensite crystals.

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Literature Cited

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    A. P. Gulyaev and E. V. Petunina Metallographic Investigation of the Transformation of Austenite into Martensite [in Russian], Trudy TsNIITMASh, Book 47, Moscow, Mashgiz (1952).

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    W. Pitsch, “Acta metallurgica”,10, No. 9 (1962).

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    V. B. Spiridonov, Yu. A. Skalov, and V. N. Iordanskii, Zavodskaya laboratoriya, No. 8 (1963).

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    J. Venables, “Philosophical magazina”,7, No. 73 (1962).

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Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 49–51, October, 1964

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Spiridonov, V.B., Skakov, Y.A. & Iordanskii, V.N. Microstructure of martensite in chromium-nickel steel. Met Sci Heat Treat 6, 630–632 (1964). https://doi.org/10.1007/BF00648705

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Keywords

  • Microstructure
  • Martensite
  • Yield Strength
  • Time Limit
  • Ultimate Strength