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- Title
The Dynamic Flow and Failure Behavior of Magnesium and Magnesium Alloys.
- Authors
Eswar Prasad, K.; Li, B.; Dixit, N.; Shaffer, M.; Mathaudhu, S.; Ramesh, K.
- Abstract
We review the dynamic behavior of magnesium alloys through a survey of the literature and a comparison with our own high-strain-rate experiments. We describe high-strain-rate experiments (at typical strain rates of 10 s) on polycrystalline pure magnesium as well as two magnesium alloys, AZ31B and ZK60. Both deformation and failure are considered. The observed behaviors are discussed in terms of the fundamental deformation and failure mechanisms in magnesium, considering the effects of grain size, strain rate, and crystallographic texture. A comparison of current results with the literature studies on these and other Mg alloys reveals that the crystallographic texture, grain size, and alloying elements continue to have a profound influence on the high-strain-rate deformation behavior. The available data set suggests that those materials loaded so as to initiate extension twinning have relatively rate-insensitive strengths up to strain rates of several thousand per second. In contrast, some rate dependence of the flow stress is observed for loading orientations in which the plastic flow is dominated by dislocation mechanisms.
- Subjects
MAGNESIUM; MAGNESIUM alloys; POLYCRYSTALS; CRYSTALLOGRAPHIC shear; DEFORMATIONS (Mechanics)
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2014, Vol 66, Issue 2, p291
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-013-0850-6