Effect of dislocation on the electrochemical property of austenite in deformed 304 stainless steels

Jinpeng Xie, Hongyun Luo, Jinlong Lyu, Kanglin Ye

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

AISI 304 metastable austenite stainless steel transforms to martensile easily under deformation. For focus on the effects induced by dislocation rather than transformed martensite, local electrochemical techniques were used to measure the electrochemical properties on austenite grain of AISI 304 stainless steel under tensile strains of 0%, 10%, 20%, 30% and 40%. The effects of dislocation density and configuration on electrochemical impedance spectra and dynamic potential polarization curves of strained samples were investigated. The results show that the impedance of the austenite reduced with the increase of the dislocation density especially at lower strain level. The anodic current density increased with the strain level, passed over a maximum and then fell significantly. The number of dislocation in a pile-up which was calculated from the results of Scanning Kelvin probe (SKP) played a more crucial role in the change of anodic current density than dislocations density, especially at high strain level.

Original languageEnglish
Pages (from-to)2857-2864
Number of pages8
JournalHangkong Xuebao/Acta Aeronautica et Astronautica Sinica
Volume35
Issue number10
DOIs
Publication statusPublished - 2014 Oct 25

Keywords

  • Dislocation density
  • Dislocation pile-up
  • Local electrochemical
  • Metastale austenite stainless steel
  • Surface potential

ASJC Scopus subject areas

  • Modelling and Simulation
  • Aerospace Engineering
  • Space and Planetary Science
  • Applied Mathematics

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