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 - Archive ouverte HAL Access content directly
Journal Articles Measurement - Journal of the International Measurement Confederation (IMEKO) Year : 2022

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

Abstract

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-Kr¨oner 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 μm) of residual stresses and of the strain-free lattice parameter is determined.
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Dates and versions

hal-03722816 , version 1 (13-07-2022)

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Cite

M. Marciszko-Wiąckowska, A. Oponowicz, A. Baczmański, Chedly Braham, M. Wątroba, et al.. 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. Measurement - Journal of the International Measurement Confederation (IMEKO), 2022, 194, pp.111016. ⟨10.1016/j.measurement.2022.111016⟩. ⟨hal-03722816⟩
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