Influence of complex hierarchy on the distribution of brittle cracks in bainitic and martensitic steel structure

Authors

  • O. V. Razumova department of Basics of Architecture, State Higher Education Establishment “Pridneprovsk State Academy of Civil Engineering and Architecture”, 24-A, Chernishevskogo str., Dnipropetrovsk 49600, Ukraine, Ukraine
  • D. A. Baribin department of Materials Science and Treatment of Materials, State Higher Education Establishment “Pridneprovsk State Academy of Civil Engineering and Architecture”, 24-A, Chernishevskogo str., Dnipropetrovsk 49600, Ukraine, Ukraine
  • V. I. Bolshakov department of Materials Science and Treatment of Materials, State Higher Education Establishment “Pridneprovsk State Academy of Civil Engineering and Architecture”, 24-A, Chernishevskogo str., Dnipropetrovsk 49600, Ukraine, Ukraine

Keywords:

microstructure, acicular ferrite, bainite, HSLA steel, cleavage fracture.

Abstract

Goal. Analysis of the propagation of transgranular and intercrystallite cleavage in bainitic structures, and methods for producing structures with a fairly complex hierarchy to stop brittle crack. Results. The above construction steel are characterized by  a complex  hierarchy,  the receipt of  which  is possible  by  subjecting the steel  rolling heating  after rolling and using doping. It lowers the threshold of cold brittleness, increases resistance to brittle fracture of steel, which is due to a refinement of the structure and an increase in the mechanical properties of complex steel. Conclusions. In this paper we analyzed the propagation of a brittle crack in the intermediate structures. The advantages of steel with a complex hierarchy of grain, such as acicular ferrite, low carbon lath martensite, which allows to suppress brittle fracture during its propagation in the body of structure.

Author Biographies

O. V. Razumova, department of Basics of Architecture, State Higher Education Establishment “Pridneprovsk State Academy of Civil Engineering and Architecture”, 24-A, Chernishevskogo str., Dnipropetrovsk 49600, Ukraine

Ph. D., Prof.

D. A. Baribin, department of Materials Science and Treatment of Materials, State Higher Education Establishment “Pridneprovsk State Academy of Civil Engineering and Architecture”, 24-A, Chernishevskogo str., Dnipropetrovsk 49600, Ukraine

Grad. st.

V. I. Bolshakov, department of Materials Science and Treatment of Materials, State Higher Education Establishment “Pridneprovsk State Academy of Civil Engineering and Architecture”, 24-A, Chernishevskogo str., Dnipropetrovsk 49600, Ukraine

Dr. Sc. (Tech.), Prof.

References

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Статья рекомендована к публикации д-ром техн. наук, В.И. Большаковым и д-ром техн. наук, Д.В. Лаухиным (Украина)

Published

2016-03-22

Issue

Section

Proceedings in memory of Starodubov