Magnesium3.3
Low Stress Creep Behavior of AZ31 Magnesium Alloys

Wednesday, June 18, 2014: 2:30 PM
Daytona 1 (Gaylord Palms Resort )
Mr. Peiman Shahbeigi Roodposhti , North Carolina State University, raleigh, NC
Dr. Apu sarkar , North Carolina State University, Raleigh, NC
Dr. K. Linga murty , North Carolina State University, Raleigh, NC
The intermediate temperature deformations of Mg-Zn-Al alloys (AZ31) with a major emphasis on the role of intermetallic phases on creep behavior of them were investigated in this study. A stress exponent of n=2 was observed at a σ/E range of  10-3 to 10-4. Transmission Electron Microscope (TEM) was employed to characterize the super plastic deformation behaviors of AZ31 alloy due to grain boundary sliding (GBS) at high temperature. Like many other Mg-Al alloys, Mg17Al12 intermetallic phase, revealed by XRD analysis, plays a critical role in deformation behavior of these kinds of soft alloys by providing many obstacles in the path of dislocation movements.

This research is supported by the National Science Foundation grant 0968825

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