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Journal of Materials Engineering and Performance

, Volume 28, Issue 11, pp 7109–7118 | Cite as

Application of X-ray Technique to Study the Structure of Ultrafine-Grained Ferritic/Martensitic Steel

  • V. D. Sitdikov
  • R. K. Islamgaliev
  • M. A. NikitinaEmail author
  • G. F. Sitdikova
Article
  • 31 Downloads

Abstract

In this work, x-ray diffraction and transmission electron microscopy (TEM) analyses have been applied to study the structure of ultrafine-grained (UFG) ferritic/martensitic steel as compared to coarse-grained samples subjected to standard treatment. The x-ray phase analysis of diffraction patterns taken in the “transmission” mode allowed determining the volume fraction and phase composition of particles in the UFG samples. The lattice parameter, the size of coherent scattering domains, the averaged dislocation density, and the fraction of edge and screw dislocations of the ferritic phase in steel were determined according to the diffraction patterns taken in the “reflection” mode. The small-angle x-ray scattering (SAXS) technique was used to study the quantitative characteristics of the size, shape, and distribution of precipitates in the UFG samples. The TEM investigations were performed on the same foils to confirm the results of SAXS. The quantitative evaluations of dispersion and dislocation hardenings in ferritic/martensitic steel were conducted on the basis of the results obtained.

Keywords

ferritic/martensitic steel transmission electron microscopy ultrafine-grained structure x-ray diffraction 

Notes

Acknowledgments

The authors are grateful to the Russian Science Foundation within the framework of the Project No. 19-19-00496. M.A. Nikitina is grateful to be supported by RFBR for processing UFG samples of ferritic/martensitic steel and performing TEM studies according to the Project No. 18-38-00649.

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Copyright information

© ASM International 2019

Authors and Affiliations

  • V. D. Sitdikov
    • 1
    • 2
  • R. K. Islamgaliev
    • 1
  • M. A. Nikitina
    • 1
    Email author
  • G. F. Sitdikova
    • 1
  1. 1.Institute of Physics of Advanced MaterialsUfa State Aviation Technical UniversityUfaRussia
  2. 2.Laboratory for Mechanics of Bulk NanomaterialsSaint Petersburg State UniversitySaint PetersburgRussia

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