High-pressure torsion assisted segregation and precipitation in a Fe-18Cr-8Ni austenitic stainless steel

Andrew Hoffman, Haiming Wen, Rinat Islamgaliev, Ruslan Valiev

Результат исследований: Научные публикации в периодических изданияхстатья

3 Цитирования (Scopus)

Аннотация

During irradiation or high-temperature aging, stainless steel can develop precipitates, significantly affecting mechanical properties. In this study atom probe tomography (APT) was used to study grain boundary segregation and secondary phases in a purely austenitic SS304 (a Fe-18Cr-8Ni steel) processed by high-pressure torsion (HPT) at 300 °C. Ni, Mn, Si enriched phase was observed at grain boundaries, and Cu nanoprecipitates were observed along and near phase/grain boundaries. Precipitation is facilitated by deformation assisted segregation along grain boundaries with a mechanism similar to vacancy diffusion in irradiated steels.
Язык оригиналарусский
Страницы (с-по)116-119
ЖурналMaterials Letters
Том243
Ранняя дата в режиме онлайн12 фев 2019
СостояниеОпубликовано - мая 2019
Опубликовано для внешнего пользованияДа

Ключевые слова

  • Nanocrystalline materials
  • Segregation
  • Atom probe tomography
  • Severe plastic deformation
  • Diffusion
  • high pressure torsion

Цитировать