The effect of strain on the impedance and surface potential of austenite in 304 stainless steels

Jinpeng Xie, Hongyun Luo, Jinlong Lv

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Local electrochemical technique was used to measure the impedance of austenite in AISI 304 stainless steel under tensile strain of 0%, 10%, 20%, 30%, 40%. Scanning Kelvin probe (SKP) technique was used to measure the potential distribution of the surface. The results showed that the impedance of the austenite declined with the increase of the strain and declined sharply under the strain of 30%. Potential of austenite decreased non-monotonously with increase of the strain. The potential reached the minimum under strain of 30% and then increased. Through the transmission electron microscope (TEM) results, plane dislocation pile-ups were observed in the grain boundary under the strain of 30% and transformed to cellular substructure structure and cell wall under 40%. Combined with the results of local electrochemistry impedance spectroscopy (LEIS) and surface potential, it may be concluded that it was the dislocation density and dislocation structure influence the impedance spectroscopy significantly, while surface potential was sensitive to the dislocation structure.

Original languageEnglish
Title of host publicationMaterials Performance, Modeling and Simulation
PublisherTrans Tech Publications Ltd
Pages648-653
Number of pages6
ISBN (Print)9783037856093
DOIs
Publication statusPublished - 2013 Jan 1
EventChinese Materials Congress 2012, CMC 2012 - Taiyuan, China
Duration: 2012 Jul 132012 Jul 18

Publication series

NameMaterials Science Forum
Volume749
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

OtherChinese Materials Congress 2012, CMC 2012
CountryChina
CityTaiyuan
Period12/7/1312/7/18

Keywords

  • Dislocation density
  • Leis
  • Surface potential

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Xie, J., Luo, H., & Lv, J. (2013). The effect of strain on the impedance and surface potential of austenite in 304 stainless steels. In Materials Performance, Modeling and Simulation (pp. 648-653). (Materials Science Forum; Vol. 749). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.749.648