Nitrogen effects on radiation response in 12Cr ferritic/martensitic alloys

Aydogan E., Gigax J. G., Parker S. S., Eftink B. P., Chancey M., Poplawsky J., ...Daha Fazla

Scripta Materialia, cilt.189, ss.145-150, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 189
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.scriptamat.2020.08.005
  • Dergi Adı: Scripta Materialia
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, DIALNET, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.145-150
  • Anahtar Kelimeler: Ferritic/martensitic alloys, Interstitial effect, Dislocation loops, Radiation induced hardening, G-phase formation, POINT-DEFECTS, FE, IRRADIATION, BEHAVIOR, MICROSTRUCTURE, INDENTATION, NICKEL, DAMAGE, CR
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

© 2020Ferritic/martensitic steels are one of the best candidates for structural materials for high dose applications in next generation nuclear reactors. The composition of structural materials must be optimized for reliable service during irradiation. This study reports the effect of interstitial nitrogen on radiation response in 12Cr ferritic/martensitic HT9 steels having a controlled nitrogen concentration. Results show that a high amount of ‘free’ nitrogen in the matrix stabilizes the interstitial clusters which leads to (i) larger loop sizes (ii) lower loop density and (iii) slightly reduced radiation induced hardening. It also affects diffusion mechanism of Ni and formation of Ni/Si-rich precipitates.