Crack growth behavior of ferritic steel for USC boilers in pressurized superheated steam

Masahiro Inuil, Yutaka Watanabe, Tatsuo Kondo, Koshi Suzuki, Kimio Kano

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this study, effects of superheated steam on cyclic crack propagation behavior of a heat resistant steel were investigated. Crack propagation experiments were carried out on NF616 (9Cr-0.5Mo-2WVNb) in pressurized superheated steam (600°C/10MPa) under cyclic loading either with or without holding time at constant load. Superheated steam environment has two opposing effects on cyclic crack growth, acceleration and retardation. A modified tarnish rupture (TR) model has been proposed to explain the crack propagation behavior. The crack propagation rate estimated based on the TR-type model well agreed with the experimental data.

Original languageEnglish
Pages (from-to)119-124
Number of pages6
JournalMaterials at High Temperatures
Volume18
Issue number2
DOIs
Publication statusPublished - 2001 Jan 1

Keywords

  • Cyclic crack growth
  • Environmental effects
  • Ferritic steel
  • Pressurized superheated steam
  • Tarnish rupture model
  • USC boiler

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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