Precipitation of σ-phase in high-nitrogen austenitic 18Cr–18Mn–2Mo–0.9N stainless steel during isothermal aging
2004; Elsevier BV; Volume: 50; Issue: 10 Linguagem: Inglês
10.1016/j.scriptamat.2004.02.013
ISSN1872-8456
AutoresTae‐Ho Lee, Chang‐Seok Oh, Chang Gil Lee, Sung-Joon Kim, Setsuo Takaki,
Tópico(s)Corrosion Behavior and Inhibition
ResumoPrecipitation mechanism of σ-phase in austenitic high-nitrogen steel (HNS) upon aging was investigated using electron microscopy and thermodynamic calculation. The precipitation sequence was found to be grain boundary Cr2N, cellular Cr2N and σ-phase with aging time. It was concluded that the nitrogen-depleted zone near Cr2N induces the nucleation of σ-phase.
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