The Role of Intergranular Stresses in Plastic Deformation Studied Using a Diffraction and Self-Consistent Model

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The Role of Intergranular Stresses in Plastic Deformation Studied Using a Diffraction and Self-Consistent Model

E. Gadalińska, A. Baczmański, M. Wróbel, S. Wroński, M. Wroński, R. Wawszczak, C. Braham, Y. Zhao, L. Le Joncour, T. Buslaps, Ch. Scheffzük

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Abstract. Diffraction methods are commonly used for the determination of the elastic lattice deformation from the displacement and broadening of the diffraction peak. The measurements are performed selectively, only for crystallites contributing to the measured diffraction peak. When several phases are present in the sample, measurements of separate diffraction peaks allow the behaviour of each phase to be investigated independently [e.g. 1-4]. Comparison of experimental data with a multi-scale model allows us to understand the physical phenomena which occur during sample deformation at the level of polycrystalline grains. In the present work the methodology combining diffraction experiment and self-consistent calculation was used to study the mechanical behaviour of groups of grains within stainless duplex steel and Al/SiC composite. Special attention has been paid to the role of second order stresses on the yield stresses of the phases, as well as on the evolution of these stresses during the deformation process. The inter-granular stresses were determined from lattice strains measured “in situ” during tensile tests. The diffraction measurements were done using synchrotron (ID15B, ESRF, Grenoble, France) and neutron (EPSILON, FLNP, JINR, Dubna, Russia) radiations.

Keywords
Diffraction Methods, Intergranular Stresses, Self-Consistent Model, in-situ Tensile Test

Published online 12/22/2016, 6 pages
Copyright © 2016 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: E. Gadalińska, A. Baczmański, M. Wróbel, S. Wroński, M. Wroński, R. Wawszczak, C. Braham, Y. Zhao, L. Le Joncour, T. Buslaps, Ch. Scheffzük, ‘The Role of Intergranular Stresses in Plastic Deformation Studied Using a Diffraction and Self-Consistent Model’, Materials Research Proceedings, Vol. 2, pp 551-556, 2017

DOI: http://dx.doi.org/10.21741/9781945291173-93

The article was published as article 93 of the book Residual Stresses 2016

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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