Magnesium alloy, microstructure, formability, biaxial loads


Magnesium AZ31B sheets of 2 mm thickness were stretch formed using a 101.6 mm diameter punch at temperatures from 25°C - 150°C, in 25°C increments. Surface strains were measured using a digital image correlation (DIC) method. The punch height vs load curve was found to be the same for temperatures of 25°C and for 50°C, while at 75°C and above the load for a given punch height started to decrease, indicating a potential change in deformation mechanism. Electron Backscatter Diffraction (EBSD) was used to quantify features of the microstructure in the tested specimens. In particular, the gradual decrease in twinning activity due to easier thermally activated slip with increasing temperatures is quantified across this range. Moreover, twin activity was found to predominantly involve the formation of compression twins that rapidly transform to create secondary twins for easier strain accommodation.

Original Publication Citation

Chelladurai, I., Miles, M.P., Fullwood, D.T. et al. JOM (2017) 69: 907. doi:10.1007/s11837-017-2309-7

Document Type

Peer-Reviewed Article

Publication Date


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Ira A. Fulton College of Engineering and Technology


Mechanical Engineering

University Standing at Time of Publication

Full Professor