|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Magnesium Technology 2016
||P-22: Effect of Increased Strain Rate on the Deformation Mechanism of AZ31 Magnesium Alloy under a Triaxial Stress State
||Chaitanya Kale, Scott Turnage, Mansa Rajagopalan, Kiran Solanki, Suveen Mathaudhu
|On-Site Speaker (Planned)
The transportation industries require lightweight materials for better performance with increased efficiency. Lightweight alloys such as AZ31 magnesium alloy have been implemented into current designs. However, certain aspects of these materials, such as stress triaxiality at high strain rates (103 s-1), have not been thoroughly investigated. This study analyzes effect of stress triaxiality on the deformation mechanism of a hot rolled AZ31 Mg alloy. Room temperature tension tests at various strain rates (10-3 to 103 s-1) were performed on specimens cut in the rolling, transverse, and normal directions with different notch geometries using Split Hopkinson Pressure bar. Pre- and post-deformation microstructures were analyzed using electron microscopy and X-ray techniques. The results from mechanical testing indicate that the multi-axial stress state causes an increase in the flow stress . Further, a shift in deformation mechanism is seen from dislocation based to twin based for the samples tested at high strain rates.
||Planned: A combination print-CD volume