首页|A novel approach for nondestructive depth-resolved analysis of residual stress and grain interaction in the near-surface zone applied to an austenitic stainless steel sample subjected to mechanical polishing

A novel approach for nondestructive depth-resolved analysis of residual stress and grain interaction in the near-surface zone applied to an austenitic stainless steel sample subjected to mechanical polishing

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  • NSTL
  • Elsevier
The choice of the grain interaction model is a critical element of residual stress analysis using diffraction methods. For the near-surface region of a mechanically polished austenitic steel, it is shown that the application of the widely used Eshelby-Kro & BULL;ner model does not lead to a satisfactory agreement with experimental observations. Therefore, a new grain interaction model called 'tunable free-surface' is proposed, allowing for the determination of the in-depth evolution of the elastic interaction between grains. It has a strong physical justification and is adjusted to experimental data using three complementary verification methods. It is shown that a significant relaxation of the intergranular stresses perpendicular to the sample surface occurs in the subsurface layer having a thickness comparable with the average size of the grain. Using the new type of X-ray Stress Factors, the in-depth evolution (up to the depth of 45 mu m) of residual stresses and of the strain-free lattice parameter is determined.

X-ray diffractionStress analysisElastic anisotropyIntergranular interactionAustenitic stainless steelX-RAY-DIFFRACTIONENERGY-DISPERSIVE DIFFRACTIONGRAZING-INCIDENCE DIFFRACTIONTEXTURED CUBIC MATERIALSELASTIC-CONSTANTSTHIN-FILMSPOLYCRYSTALLINE MATERIALSSYNCHROTRON DIFFRACTIONCOMPOSITION GRADIENTSDUPLEX STEEL

Marciszko-Wiackowska, M.、Oponowicz, A.、Baczmanski, A.、Braham, Ch.、Watroba, M.、Wrobel, M.、Klaus, M.、Genzel, Ch.

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2022

10.1016/j.measurement.2022.111016

Measurement

Measurement

SCI
ISSN：0263-2241
年,卷(期)：2022.194
  • 4
  • 81