Nitride-Strengthened Reduced Activation Heat-Resistant Steels

  • Wei YanEmail author
  • Wei Wang
  • Yiyin Shan
  • Ke Yang
  • Wei Sha
Part of the Engineering Materials book series (ENG.MAT.)


Nitride-strengthened reduced activation ferritic/martensitic steels are anticipated to have higher creep strength because of the remarkable thermal stability of nitrides. Such steels with different manganese contents are designed based on the chemical composition of Eurofer97 steel but the carbon content is reduced to an extremely low level. The larger amount of vanadium-rich nitrides and more dissolved chromium in the matrix could be responsible for the similar strength to Eurofer97 steel. The steels have the microstructure of full martensite with fine nitrides dispersed homogeneously in the matrix and display extremely high strength but poor toughness. Compared with the steel with low carbon content (0.005 % in wt%), the steel with high carbon content (0.012 % in wt%) has not only the higher strength but also the higher impact toughness and grain coarsening temperature. The complicated Al2O3 inclusions are responsible for the initiated cleavage fracture by acting as the critical cracks.


Impact Toughness Cleavage Fracture Al2O3 Particle Al2O3 Inclusion Nitride Precipitation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Wei Yan
    • 1
    Email author
  • Wei Wang
    • 1
  • Yiyin Shan
    • 1
  • Ke Yang
    • 1
  • Wei Sha
    • 2
  1. 1.Institute of Metal Research, Chinese Academy of SciencesShenyangChina
  2. 2.Queen’s University BelfastBelfastUK

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