Stress partitioning behavior in an fcc alloy evaluated by the in situ/ex situ EBSD-Wilkinson method

• Published in: Acta materialia Vol. 59; no. 10; pp. 4177 - 4185
• Main Authors: Ojima, Mayumi, Adachi, Yoshitaka, Suzuki, Seiichi, Tomota, Yo
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2011
• Subjects: Austenitic steels; Backscattering; Diffraction; Elastic behavior; Electron backscattering diffraction (EBSD); Grains; Image analysis; Internal stresses; Neutron diffraction; Partitioning; Strain; Strain measurement; Stresses; Electron backscattering diffraction (EBSD); Image analysis; Elastic behavior; Internal stresses; Austenitic steels
• ISSN: 1359-6454; 1873-2453
• DOI: 10.1016/j.actamat.2011.03.042

Hierarchical stress partitioning behavior among grains in the elasto-plastic region of a polycrystalline material was studied by a combined technique of in situ/ex situ electron backscattering diffraction based on local strain measurements (the EBSD-Wilkinson method) and neutron diffraction measurements during tensile deformation. Elastic strains parallel to the tensile direction both during loading (e11) and after unloading (e′11) were measured. The volume-averaged stress partitioning among [ hkl] family grains measured by the EBSD-Wilkinson method was in good agreement with that measured by neutron diffraction measurements, but a more complicated strain distribution occurred microscopically because of restriction from the surrounding grains.