Effects of laser shock peening with different coverage layers on fatigue behaviour and fractural morphology of Fe-Cr alloy in NaCl solution

K. Y. Luo, Y. F. Yin, C. Y. Wang, Q. F. Chai, J. Cai, J. Z. Lu, Y. F. Lu

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Effects of massive laser shock peening (LSP) treatment as a function of coverage layer on surface residual stress, microstructure, and corrosion fatigue (CF) resistance of Fe-Cr alloy were studied by X-ray diffraction technique, scanning electron microscope observations, and corrosion fatigue crack growth (CFCG) testing. Special attention was paid to the details of compressive residual stress and fracture morphology, and the influence mechanism of coverage layer on CF behaviour was also determined. Results indicated that LSP generated deeper compressive residual stress and effectively decreased the CFCG rate, and increased coverage layers further improved the corrosion fatigue life of notched specimens.

Original languageEnglish (US)
Pages (from-to)168-179
Number of pages12
JournalJournal of Alloys and Compounds
Volume773
DOIs
StatePublished - Jan 30 2019

Keywords

  • Corrosion fatigue
  • Fe-Cr alloy
  • Fractural morphology
  • Laser shock peening
  • Stress corrosion

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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