Analysis of the dislocation activity of Mg – Zn – Y alloy using synchrotron radiation under tensile loading

An understanding of deformation behavior and texture development is crucial for the formability improvement of Mg alloys. X-ray line profile analysis using the convolutional multiple whole profile (CMWP) fitting method allows the experimental determination of dislocation densities separately for different Burgers vectors up to a high deformation degree. A wider use of this technique still requires exploration and testing of various materials. In this regard, the reliability of the CMWP fitting method for Mg – Zn – Y alloys, in terms of the dislocation activity during tensile deformation, was verified in the present study by the combined analysis of electron backscatter diffraction (EBSD) investigation and visco-plastic self-consistent (VPSC) simulation. The predominant activity of non-basal 〈 a 〉 dislocation slip was revealed by CMWP analysis, and Schmid factor analysis from the EBSD results supported the higher potential of non-basal dislocation slip in comparison with basal 〈 a 〉 dislocation slip. Moreover, the relative slip activities obtained by the VPSC simulation also show a similar trend to those obtained from the CMWP evaluation.

Source: Journal of Synchrotron Radiation - May 11, 2023 Category: Physics Authors: Ha, C. Kim, Y.M. Woo, S.K. Maawad, E. Letzig, D. Yi, S. Tags: dislocation slip activity synchrotron radiation tensile test magnesium alloy research papers Source Type: research