Intergrannular strain evolution in a zircaloy-4 alloy with Widmanstatten microstructure Page: 3 of 31
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A Zircaloy-4 alloy with Widmanstatten - Basketweave microstructure and random
texture has been used to study the deformation systems responsible for the polycrystalline
plasticity at the grain level. The evolution of internal strain and bulk texture is investigated using
neutron diffraction and an elasto-plastic self-consistent (EPSC) modeling scheme. The
macroscopic stress-strain behavior and intergranular (hkil-specific) strain development, parallel
and perpendicular to the loading direction, were measured in-situ during uniaxial tensile loading.
Then, the EPSC model was employed to simulate the experimental results. This modeling
scheme accounts for the thermal anisotropy; elastic-plastic properties of the constituent grains;
and activation, reorientation, and stress relaxation associated with twinning. The agreement
between the experiment and the model will be discussed as well as the critical resolved shear
stresses (CRSS) and the hardening coefficients obtained from the model.
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Clausen, Bjorn; Vogel, Sven C; Garlea, Eena; Choo, Hahn; Pang, Judy W L & Kenik, Edward A. Intergrannular strain evolution in a zircaloy-4 alloy with Widmanstatten microstructure, article, January 1, 2009; [New Mexico]. (https://digital.library.unt.edu/ark:/67531/metadc928464/m1/3/: accessed March 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.