Characterization of microstructure and local deformation in 316NG weld heat-affected zone and stress corrosion cracking in high temperature water

Zhanpeng Lu, Tetsuo Shoji, Fanjiang Meng, He Xue, Yubing Qiu, Yoichi Takeda, Koji Negishi

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

Microstructure and local deformation in 316NG weld heat-affected zones were measured by electron-back scattering diffraction and hardness measurements. With increasing the distance from the fusion line, kernel average misorientation decreases and the fraction of Σ3 boundaries increases. Stress corrosion cracking growth rates in high temperature water were measured at different locations in the heat-affected zones that correspond to different levels of strain-hardening represented by kernel average misorientation and hardness distribution. Intergranular cracking along random boundaries as well as extensive intergranular crack branching is observed in the heat-affected zone near the weld fusion line.

Original languageEnglish
Pages (from-to)1916-1932
Number of pages17
JournalCorrosion Science
Volume53
Issue number5
DOIs
Publication statusPublished - 2011 May 1

Keywords

  • A. Stainless steel
  • B. SEM
  • C. Reactor condition
  • C. Welding
  • Stress corrosion

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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