Role of Grain Boundaries on the Cyclic Steam Oxidation Behaviour of 18-8 Austenitic Stainless Steel

Jingbo Yan, Yimin Gao, Y. Gu, Fei Sun, Zhen Yang, Jintao Lu, Hongfei Yin, Yefei Li

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This work investigated the oxidation behaviour of 18-8 austenitic stainless steel under cyclic steam oxidation condition. The results indicate that grain boundaries not only promote the chromium outward diffusion, but also provide the fast diffusion paths for the oxygen penetration. Thus, oxide inward growth occurs when the chromium content at scale-matrix interface cannot sustain the continuous chromia scale. In addition, the grain boundaries promote the Fe outward diffusion, accompanied with the fast growth of interfacial voids between two oxide layers. As a result, the oxide scale exfoliates once the voids grow to a critical value.

Original languageEnglish
Pages (from-to)409-424
Number of pages16
JournalOxidation of Metals
Volume85
Issue number3-4
DOIs
Publication statusPublished - 2016 Apr 1
Externally publishedYes

Keywords

  • Interface
  • Oxide inward growth
  • Scale spallation
  • Thermal cycling

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Metals and Alloys
  • Materials Chemistry

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