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Mechanical behavior of polycrystals: Coupled in situ DIC-EBSD analysis of pure copper under tensile test

Article dans une revue avec comité de lecture
Auteur
ccGOULMY, Jean-Patrick
ccDEPRIESTER, Dorian
GUITTONNEAU, F.
ccJÉGOU, Sébastien
211915 Mechanics surfaces and materials processing [MSMP]
BARRALLIER, Laurent
211915 Mechanics surfaces and materials processing [MSMP]

URI
http://hdl.handle.net/10985/23782
DOI
10.1016/j.matchar.2022.112322
Date
2022-12
Journal
Materials Characterization

Résumé

Understanding the mechanisms at the microstructure scale is of great importance for modeling the behavior of materials at different scales. To this end, digital image correlation (DIC) is an effective measurement method for evaluating the strains generated by various loading conditions. The objective of this paper is to describe the experimental setup and the use of high resolution digital image correlation (HRDIC) during in situ Scanning Electron Microscope (SEM) tests in order to provide a coupling between polycrystalline modeling and experiment in the near future. The HRDIC technique is used to evaluate the tensile behavior of a pure copper polycrystal at room temperature. Several magnitudes are investigated in order to discuss the representativeness of the results with respect to the macroscopic scale. The selected image correlation parameters are discussed regarding the ability of the technique to define inter- and intra- granular strain heterogeneities. Finally, based on EBSD analyzes, the impact of grain orientation on the mechanical behavior is discussed. The Schmid factor, calculated from a macroscopic stress, appears to be the determining factor concerning the orientation of the location bands. On the other hand, it is not sufficient to define the mean strains in the grains.

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MSMP_MATCHAR_2022_GOULMY.pdf
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  • Laboratoire Mechanics, Surfaces and Materials Processing (MSMP)

Documents liés

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  • Classification of the acquisition conditions driving the accuracy of strain measurements during in situ DIC with scanning electron microscope 
    Article dans une revue avec comité de lecture
    ccGOULMY, Jean-Patrick; GUITTONNEAU, Fabrice; ccJÉGOU, Sébastien; BARRALLIER, Laurent (Wiley, 2023-07-13)
    Performing in situ scanning electron microscope (SEM) tests is an interesting way to visualise strain heterogeneities under mechanical loading. An essential step before performing the tests is to define the acquisition ...
  • Crystal Plasticity simulations of in situ tensile tests: A two-step inverse method for identification of CP parameters, and assessment of CPFEM capabilities 
    Article dans une revue avec comité de lecture
    ccDEPRIESTER, Dorian; ccGOULMY, Jean-Patrick; BARRALLIER, Laurent (Elsevier BV, 2023-09)
    As the computational capability of modern computers increases, the Crystal Plasticity Finite Element Method (CPFEM) becomes more and more popular in materials science to model the mechanical behaviour of polycrystals. ...
  • Slip identification from HR-DIC/EBSD: Incorporating Crystal Plasticity constitutive laws 
    Article dans une revue avec comité de lecture
    ccDEPRIESTER, Dorian; ccGOULMY, Jean-Patrick; BARRALLIER, Laurent (Elsevier, 2024-12)
    It is well known that dislocation slip plays a major role in plastic deformation of polycrystals. Depending on the crystal’s symmetry, only a limited number of Slip Systems (SSs) are possible, and their activities depend ...
  • Towards an image quality criterion to optimize Digital image correlation. Use of an analytical model to optimize acquisition conditions 
    Article dans une revue avec comité de lecture
    ccGOULMY, Jean-Patrick; ccJÉGOU, Sébastien; BARRALLIER, Laurent (Elsevier BV, 2022)
    Digital image correlation (DIC) is expanding in many fields. In particular, it requires that the acquisition conditions and speckle be adapted to each application. A new methodology allowing to define the quality of the ...
  • Cementite Residual Stress Analysis in Gas-nitrided Low Alloy Steels 
    Article dans une revue avec comité de lecture
    GOEKJIAN, S.; GUITTONNEAU, Fabrice; BARRALLIER, Laurent; ccJÉGOU, Sébastien (Materials Research Forum LLC, 2016)
    This paper deals with the measurement of residual stresses in cementite after gas-nitriding of a 33CrMoV12-9 steel. During nitriding, precipitation of nanometric alloying elements nitrides and cementite at grain boundaries ...

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