|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Magnesium Technology 2017
||Mechanical Properties and Deformation Mechanism of Mg-Y Alloy with Various Grain Sizes
||Ichiro Kawarada, Ruixiao Zheng, Akinobu Shibata, Hidetoshi Somekawa, Shigenobu Ogata, Nobuhiro Tsuji
|On-Site Speaker (Planned)
In the present study, Mg-Y alloy was provided for high pressure torsion (HPT) and subsequent annealing treatment. After the HPT by 5 rotations, nanocrystalline (NC) structures with an average grain size of about 240 nm having deformed characteristics were obtained. After subsequent annealing at various temperatures for 2-60 min, fully recrystallized structures with different average grain sizes ranging from 0.66 μm to 8.13 μm were obtained. Good balance of tensile strength and ductility could be realized in the fine grained alloys. For the specimen having a mean grain size of 2.13 μm, the yield strength and total tensile elongation were 180 MPa and 37 %, respectively, which were much higher than those of pure Mg with similar grain sizes. The significant contribution of Y on the microstructure and mechanical properties is discussed.