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The Effect of Strain Rate on the Fracture Modes of Mg Alloys

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Abstract:

Bending and impact tests were conducted on magnesium alloys AZ31 and AZ80 in different microstructure conditions. It is found that the strength parameters are increased quite a lot, and the ductility parameters (bending flection) decreased with increase in strain rate. The damaged surface analysis in SEM revealed that, the micro crack nucleation modes, micro crack coalescence and final crack path are varied with the stress state on the specimen, and the crack nucleation modes are varied with the initial strain rate. The effect of strain rate on fracture modes is discussed.

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Periodical:

Advanced Materials Research (Volumes 26-28)

Pages:

1221-1226

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.26-28.1221

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Online since:

October 2007

Authors:

Gao Feng Quan, Da Chuan Zhu, Feng Yan, Zhao Ming Liu

Keywords:

AZ31 Mg Alloy, Fracture Mechanic, Fracture Morphology, Strain Rate

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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