Direct observation and modeling of growth-induced stacking fault in chromium-rich γ-M23C6 carbides

M. Souissi, M. H.F. Sluiter, Tetsuya Matsunaga, M. Tabuchi, M. J. Mills, R. Sahara

研究成果: Article査読

1 被引用数 (Scopus)

抄録

γ-M23C6 carbide often forms at grain boundaries in creep-resistant steels and plays a crucial role in creep resistance by blocking microstructural changes at elevated temperatures. Given that the dislocations and stacking faults (SFs) in carbides may affect their stability, the observation of SF formation in γ-M23C6 using atomic-scale microscopy has implications for Cr-rich creep-resistant steels. Our analysis of SF energies (SFEs) derived from density functional theory calculations reveals that the SFEs are high, which suggests that the SF is not induced by external shear stress deformation but by lattice misfit between conjoined subgrains nucleated from the same austenite grain.

本文言語English
ページ(範囲)290-294
ページ数5
ジャーナルScripta Materialia
178
DOI
出版ステータスPublished - 2020 3 15
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学
  • 金属および合金

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