|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Microstructure Rearrangements in Magnesium Alloys Upon Thermo-mechanical Processing Followed by Advanced In-situ Synchrotron Radiation
||Xiaojing Liu, Emil Zolotoyabko, Klaus-Dieter Liss
|On-Site Speaker (Planned)
We study in-situ heating experiments on rolled sheets AZ31 and AZ91 Mg alloys using both synchrotron and laboratory X-Ray methods. Azimuthal diffraction intensities along the Debye-Scherrer rings (AT-plots) and azimuthally integrated diffraction intensities, plotted as functions of the scattering vector (QT-plots) are used to obtain information on grain recovery and recrystallization temperatures, temperature-dependent lattice parameters of the Mg/Al matrix and intermetallic precipitates, as well as the evolution of the precipitate volume fraction. The intermetallic phases in different Mg-Al alloys are distinguished successfully. Phase transformations and microstrutural evolution in AZ-type alloys during heating have been detected in-situ. In addition, the thermal expansion coefficients of both intermetallic and matrix are calculated. Their anomalies reveal changes of phase composition. The results demonstrate that the in-situ synchrotron method is a powerful tool to investigate microstructure and phase transformation in metals.