|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Microstructure Rearrangements in Magnesium Alloys upon Thermo-mechanical Processing Studied by Advanced In-situ Synchrotron X-ray Diffraction
||Xiaojing Liu, Emil Zolotoyabko, Klaus-Dieter Liss
|On-Site Speaker (Planned)
In the present paper, we describe in-situ heating experiments on rolled AZ31 and AZ91 Mg alloys and analyze experimental results obtained using both synchrotron and laboratory X-ray diffraction methods. We found that X-ray diffraction provides rich information on heat-mediated transformation processes, which lead to the formation of different intermetallic phases. The growth and decay of intermetallic inclusions can be monitored via respective diffraction intensities. Measurements of chemical strain in the matrix solid solution allow us to shed light on atomic diffusion of Al from the Mg-Al matrix into intermetallic inclusions and vice versa. Combined effects of temperature and Al content on the c/a ratio in magnesium-aluminum alloys are investigated and discussed. In addition, the thermal expansion coefficients of the intermetallic phases and the matrix are determined. Important information on the recovery and recrystallization processes can be extracted from azimuthal distributions of diffraction intensity within the two-dimensional diffractograms.
||Characterization, Magnesium, Phase Transformations