|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||In-situ Methods for Unraveling Structure-Property Relationships in Light Metals
||Formability of Magnesium Alloy AZ31B from Room Temperature to 125C under Biaxial Tension
||Isaac Chelladurai, Andrew Orme, Michael P Miles, David T Fullwood, John E. Carsley, Raj K. Mishra, Irene J Beyerlein, Marko Knezevic
|On-Site Speaker (Planned)
Magnesium AZ31B sheets, of 2 mm thickness, were stretch formed using a 100 mm diameter punch at room temperature and for temperatures ranging from 25°C - 125°C. Surface strains were measured using digital image correlation method to verify biaxial stretching. The punch height vs load curve was found to be the same for temperatures of 25°C and 50°C, while at 75°C the load for a punch height begins to decrease. This difference seems to indicate a change in deformation mechanism between 50°C and 75°C. Electron Backscatter Diffraction (EBSD) was used to quantify microstructure features in the as-received and the strained specimens. Rather than a sudden transition from twinning to slip at low temperatures, it appears that twinning gradually decreases and slip activity increases as temperatures rise across the range from 25°C - 125°C. The twin activity involves formation of compression twins which rapidly transform into secondary twins for strain accommodation.