Investigation of the dislocation structure and long-range internal stresses developing in an austenitic steel during tensile test and low-cycle fatigue

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

18/10 austenitic stainless steel samples were tensile deformed to different strain values, and fatigued with different plastic strain amplitudes up to failure. In latter case special care was taken to unload the samples either from the tensile or the compressive stress maximum of the hysteresis loop, respectively. The specimens were cut perpendicular and parallel to the load axis, and these surfaces were investigated by high resolution X-ray line profile analysis. The line profiles reveal characteristically asymmetric line broadening as compared to the undeformed initial state. From the line broadening and the asymmetry the dislocation density and the long-range internal stresses prevailing in the cell walls and in the cell interiors have been evaluated. The long-range internal stresses were interpreted on the basis of the composite model of the dislocation cell structure. The results can be used for the different residual life prediction methods.

Original languageEnglish
Pages (from-to)113-120
Number of pages8
JournalPeriodica Polytechnica Mechanical Engineering
Volume40
Issue number2
Publication statusPublished - Jan 1 1996

Keywords

  • Line broadening
  • Low-cycle fatigue
  • Plastic deformation
  • X-ray line profile

ASJC Scopus subject areas

  • Mechanical Engineering

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