Abstracts Book - IMRC 2018

• SD3-O002
ANISOTROPIC DEFECT ACCUMMULATION IN ROLLED ALUMINUM
BY EBSD AND XRD
Emanuel Benatti 1,2 , Natalia de Vincentis 1,2 , Martina Cecilia Avalos 1,2 , Francisco Cruz Gandarilla 3 ,
Heinz-Günter Brokmeier 4 , Raul Eduardo Bolmaro 1,2
1 Instituto de Fisica Rosario, Materials Science Laboratory, Argentina. 2 Universidad Nacional de
Rosario, , Argentina. 3 Instituto Politécnico Nacional - IPN, Escuela Superior de Física y
Matemáticas., Mexico. 4 Helmholtz Zentrum Geesthacht, Institut für Werkstoffkunde und
Werkstofftechnik, Germany.
Severe Plastic Deformation (SPD) can generate large microstructural changes in
metals and alloys and there is a strong evidence about crystals accumulating
energy not only due to the alloy or deformation process but also in function of
their orientation. However, there are no general rules to explain or calculate the
stored energy on SPD materials. The qualitative and quantitative
comprehension of such processes, as well as about the evolution of defect
structures, could allow to predict more precisely the response of different
materials subject to various deformation and heat treatment processes.
We present correlations between EBSD and XRD results obtained in AA1050 Al
sheets subject to rolling until reaching 70 % thickness reduction.
XRD experiments were performed in PETRA-III, DESY synchrotron beam in
Hamburg, Germany. Results were obtained by collecting 37 complete Debye-
Scherrer image plates in transmission geometry with a highly parallel ~86.3 KeV,
100 µm x 100 µm synchrotron beam. Generalized Pole Figures (GPF) were
obtained for defects and later on used to calculate Generalized Distribution
Functions (GDF) by using MTEX toolbox.
Electron Back Scattering Diffraction (EBSD) scans have been performed to
calculate several misorientation related parameters, like GOS, GAM, KAM and
GND and grain size, The results were obtained in a FEG-SEM Quanta 200 FEI
equipped with TSL-OIM 7.3 acquisition and processing software. Comparison
between those two different techniques may shed light on the complex
mechanisms of further recovery and recrystalization phenomena.
Keywords: Defects, Microstructure, EBSD
Presenting authors email: bolmaro@ifir-conicet.gov.ar