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Stress evolution in plastically deformed austenitic and ferritic steels determined using angle- and energy-dispersive diffraction

Article dans une revue avec comité de lecture
Author
MARCISZKO-WIACKOWSKA, M
445585 AGH University of Science and Technology [Krakow, PL] [AGH UST]
BACZMANSKI, Andrzej
445585 AGH University of Science and Technology [Krakow, PL] [AGH UST]
ccBRAHAM, Chedly
WATROBA, M.
ccWRONSKI, Sebastian
445585 AGH University of Science and Technology [Krakow, PL] [AGH UST]
WAWSZCZAK, R.
445585 AGH University of Science and Technology [Krakow, PL] [AGH UST]
GONZALEZ, Gonzalo
196410 Instituto de Investigaciones en Materiales (Mexico, Mexico)
ccKOT, Piotr
KLAUS, Manuela
ccGENZEL, Christoph

URI
http://hdl.handle.net/10985/24793
DOI
10.1016/j.matchar.2023.113114
Date
2023-06
Journal
Materials Characterization

Abstract

In the presented research, the intergranular elastic interaction and the second-order plastic incompatibility stress in textured ferritic and austenitic steels were investigated by means of diffraction. The lattice strains were measured inside the samples by the multiple reflection method using high energy X-rays diffraction during uniaxial in situ tensile tests. Comparing experiment with various models of intergranular interaction, it was found that the Eshelby-Kr¨oner model correctly approximates the X-ray stress factors (XSFs) for different reflections hkl and scattering vector orientations. The verified XSFs were used to investigate the evolution of the first and second-order stresses in both austenitic and ferritic steels. It was shown that considering only the elastic anisotropy, the non-linearity of sin2ψ plots cannot be explained by crystallographic texture. Therefore, a more advanced method based on elastic-plastic self-consistent modeling (EPSC) is required for the analysis. Using such methodology the non-linearities of cos2φ plots were explained, and the evolutions of the first and second-order stresses were determined. It was found that plastic deformation of about 1–2% can completely exchange the state of second-order plastic incompatibility stresses.

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