Corrosion Science and Technology

  • 제2권5호
  • /
  • Pages.225-232
  • /
  • 2003
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  • 1598-6462(pISSN)
  • /
  • 2288-6524(eISSN)
한국부식방식학회 (The Corrosion Science Society of Korea)
권호 표지

Spalling of the Oxide Scales Foemed on Stainless Steels During Cooling

  • Saeki, Isao (Department of Materials Science and Engineering, Graduate School of Engineering Hokkaido Universiry) ;
  • Ogama, Tetsuro (Department of Materials Science and Engineering, Graduate School of Engineering Hokkaido Universiry) ;
  • Furuichi, Ryusaburo (Department of Materials Science and Engineering, Graduate School of Engineering Hokkaido Universiry) ;
  • Kikkawa, Shinichi (Department of Materials Science and Engineering, Graduate School of Engineering Hokkaido Universiry)
  • 발행 : 2003.10.01
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초록

High temperature oxidation of SUS430 and SUS304 stainless steels in 16.7 kPa $O_2$ - 20.3 kPa $H_2O$ - balanced N2 atmosphere at 1273 K was studied focused on the scale spalling during cooling after an isothermal oxidation. Spalling of the oxide scale during cooling occurred only for SUS304 stainless steel. The oxide scale was composed of two layers and they detached at the interface between them. The reason for the spalling could not be explained only by thermal stresses applied to the specimen during heating and cooling. A new mechanism for scale spalling was proposed based on combination of thermal stresses and thermal shock caused by a fast Martensite transformation of substrate metal.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Education, Science, and Sports, Japan

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