|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Thermo-mechanical Characterization of Materials with Special Emphasis on In Situ Techniques
||In-situ Analysis of the Tensile Deformation Modes and Anisotropy of Extruded Mg-10Gd-3Y-0.5Zr (wt.%) at Elevated Temperatures
||Huan Wang, Carl Boehlert, Qudong Wang, Dongdi Yin, W Ding
|On-Site Speaker (Planned)
The deformation modes and anisotropic behavior during the tensile deformation of extruded Mg-10Gd-3Y-0.5Zr (wt.%) at 200, 250 and 300oC were investigated using in-situ SEM. The samples tested along the extrusion direction (ED) exhibited higher strength than that for the samples perpendicular to the ED (TD) and the samples oriented 45o to the ED. Dislocation slip was the main deformation mode during the tensile deformation, while GBS contributed at 300oC. No twinning was observed. Non-basal slip accounted for 21%, 7% and 36% of the total active slip systems at 200oC for the ED, TD and 45o samples, respectively. The non-basal slip contribution was 12~17% at 250oC, and it decreased to 3~5% at 300oC. Multiple-slip within grains and slip transfer across grain boundaries were frequently observed at 200 and 250oC. Intergranular cracks were more likely to initiate at the boundaries where the neighboring grains were in hard orientations for basal slip.
||Planned: Supplemental Proceedings volume