Study of the Microstructure of AZ31B Magnesium Alloy under High Strain Rate Deformation

Abstract:

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In order to investigate the microstructure evolution under high strain rate deformation of magnesium alloy, AZ31B magnesium alloy was impacted by Split Hopkinson Pressure Bar within the strain rates of 496s-1 to 2120s-1, then the specimens were observed by optical microscopy. The results show that when the strain rate are relatively low (496s-1-964s-1), the microstructure is predominated by high density of twinning, while increase the strain rate to 2120s-1 the volume fraction of twins is decreased. This implies that at relatively lower strain rate the deformation mechanism of AZ31B magnesium alloy under impact loading is twinning; increasing the strain rate the prismatic slip and pyramidal slip may be active besides twinning.

Info:

Periodical:

Edited by:

Yafang Han, Fusheng Pan, Jianmao Tang, Chungen Zhou

Pages:

325-331

DOI:

10.4028/www.scientific.net/MSF.686.325

Citation:

P. L. Mao et al., "Study of the Microstructure of AZ31B Magnesium Alloy under High Strain Rate Deformation", Materials Science Forum, Vol. 686, pp. 325-331, 2011

Online since:

June 2011

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Price:

$35.00

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