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HomeMaterials Science ForumMaterials Science Forum Vol. 686Study of the Microstructure of AZ31B Magnesium...

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

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Abstract:

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.

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Advanced Structural Materials, IUMRS-ICA 2010

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Periodical:

Materials Science Forum (Volume 686)

Pages:

325-331

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.686.325

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Online since:

June 2011

Authors:

Ping Li Mao, Zheng Liu, Chang Yi Wang, Zhi Wang

Keywords:

AZ31B Magnesium Alloy, High Strain Rate Deformation, Microstructure

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