@article{sato,
  title = {Insights into Creep Properties and Microstructure of Gr. 91 Steels with Varied Impurity Contents},
  author = {Katsuhiro Sato, Masatoshi Mitsuhara, Takahiro Kimura, Yoshiki Shioda, Takuya Kawarasaki, Keiji Kubushiro, Satoshi Hata, Kota Sawada, Kazuhiro Kimura},
  publisher = {Iron and Steel Institute of Japan},
  year = {2026},
  keywords = {creep strength enhanced ferritic steels, Type 2 specification, creep void, segregation, block/ packet boundaries}
}