Towards understanding the effect of deformation mode on stress corrosion cracking susceptibility of grade 2205 duplex stainless steel


Ornek C. , Engelberg D. L.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol.666, pp.269-279, 2016 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 666
  • Publication Date: 2016
  • Doi Number: 10.1016/j.msea.2016.04.062
  • Title of Journal : MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
  • Page Numbers: pp.269-279
  • Keywords: Duplex stainless steel, Atmospheric corrosion, Stress corrosion cracking, Electron backscatter diffraction (EBSD), X-Ray diffraction (XRD), Scanning electron microscopy (SEM), PITTING CORROSION, 304-STAINLESS-STEEL, DISSOLUTION, AUSTENITE, BEHAVIOR, FERRITE, PHASES

Abstract

The effect of bending, rolling, and tensile deformation on stress and strain development in grade 2205 duplex stainless steel has been investigated using x-ray diffraction (XRD) and electron backscatter diffraction (EBSD) analyses. The deformed microstructures were assessed for their stress corrosion cracking (SCC) susceptibility, with highest microstructure propensity observed after bending deformation. Strain localisation occurred in the austenite, independent of applied deformation mode. Cold rolling and bending also resulted in stress development in the austenite, with the ferrite also indicating significantly increased stresses after tensile straining. The austenite phase became more susceptible towards SCC, whereas the ferrite seemed to be more prone towards selective dissolution. Rolling deformation enhanced the propensity to localised corrosion. (C) 2016 The Authors. Published by Elsevier B.V.