TY - GEN
T1 - Effect of aging treatment on dynamic behavior of Mg-Gd-Y alloy
AU - Wang, Lin
AU - Qin, Qiao Yun
AU - Tan, Cheng Wen
AU - Zhang, Fan
AU - Li, Shu Kui
PY - 2011
Y1 - 2011
N2 - Magnesium alloy is very attractive in many industrial applications due to its low density. The structure-property relationships of the magnesium alloy under quasi-static loading have been extensively investigated. However, the dynamic behavior, particularly the mechanism of high-rate plastic deformation, of the magnesium alloy requires more in-depth investigations. In this paper, the effect of aging treatment on the quasi-static and dynamic properties of a typical rare earth Mg-Gd-Y magnesium alloy is investigated. In particular, the plastic deformation mechanism under dynamic compression loading is discussed. Split Hopkinson Pressure Bar (SHPB) was used to carry out dynamic compression tests with controllable plastic deformation by using stopper rings. The experimental results demonstrate that both static and dynamic properties of the Mg-Gd-Y alloy vary under various aging treatment conditions (under-aged, peak-aged and over-aged conditions), due to two different kinds of second phases: remnant micro size phase from solid solution treatment and nano precipitation from aging treatment. The results of microstructure characterization and statistic analysis of the metallographic phase are presented. The area fraction of the twinned grains increases due to aging treatment and dynamic loading. The main plastic deformation mechanism of the rare earth Mg-Gd-Y magnesium alloy is dislocation slip, rather than twinning for the conventional AZ31 magnesium alloy under high strain rate loading.
AB - Magnesium alloy is very attractive in many industrial applications due to its low density. The structure-property relationships of the magnesium alloy under quasi-static loading have been extensively investigated. However, the dynamic behavior, particularly the mechanism of high-rate plastic deformation, of the magnesium alloy requires more in-depth investigations. In this paper, the effect of aging treatment on the quasi-static and dynamic properties of a typical rare earth Mg-Gd-Y magnesium alloy is investigated. In particular, the plastic deformation mechanism under dynamic compression loading is discussed. Split Hopkinson Pressure Bar (SHPB) was used to carry out dynamic compression tests with controllable plastic deformation by using stopper rings. The experimental results demonstrate that both static and dynamic properties of the Mg-Gd-Y alloy vary under various aging treatment conditions (under-aged, peak-aged and over-aged conditions), due to two different kinds of second phases: remnant micro size phase from solid solution treatment and nano precipitation from aging treatment. The results of microstructure characterization and statistic analysis of the metallographic phase are presented. The area fraction of the twinned grains increases due to aging treatment and dynamic loading. The main plastic deformation mechanism of the rare earth Mg-Gd-Y magnesium alloy is dislocation slip, rather than twinning for the conventional AZ31 magnesium alloy under high strain rate loading.
UR - http://www.scopus.com/inward/record.url?scp=80051814622&partnerID=8YFLogxK
U2 - 10.1007/978-1-4419-8228-5_44
DO - 10.1007/978-1-4419-8228-5_44
M3 - Conference contribution
AN - SCOPUS:80051814622
SN - 9781441982278
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 311
EP - 317
BT - Dynamic Behavior of Materials - Proceedings of the 2010 Annual Conference on Experimental and Applied Mechanics
PB - Springer New York LLC
ER -