Effects of Mn on the Precipitation Behaviors in High-Nitrogen Austenitic Stainless Steels

Feng Shi; Yang Qi; Chun Ming Liu

doi:10.4028/www.scientific.net/AMR.194-196.32

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 194-196Effects of Mn on the Precipitation Behaviors in...

Effects of Mn on the Precipitation Behaviors in High-Nitrogen Austenitic Stainless Steels

Abstract:

Precipitation behaviors of Fe-18Cr-12Mn-0.48N and Fe-18Cr-18Mn-0.43N high-nitrogen austenitic stainless steels isothermally aged at 800°C were investigated by using optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that precipitation both display discontinuous cellular way and the major precipitates are both M₂N phases accompanied by scattered M₂₃C₆ phases at grain boundary in the experimental steels. Increment of Mn content can not change the precipitation way and precipitation type. Increment of Mn content makes M₂N precipitates obviously increase and increment of Mn and C contents makes M₂₃C₆ precipitates increase.

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Periodical:

Advanced Materials Research (Volumes 194-196)

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32-37

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https://doi.org/10.4028/www.scientific.net/AMR.194-196.32

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Online since:

February 2011

Authors:

Feng Shi, Yang Qi, Chun Ming Liu

Keywords:

Austenitic Stainless Steel, High Nitrogen, Manganese, Precipitation

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