Effect of Tensile Twinning on Low Temperature Shear Formability of Mg-3Al-1Zn Alloy

Ebubekir Dogan; Matthew W. Vaughan; Ibrahim Karaman

doi:10.4028/www.scientific.net/AMR.922.108

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 922Effect of Tensile Twinning on Low Temperature...

Effect of Tensile Twinning on Low Temperature Shear Formability of Mg-3Al-1Zn Alloy

Abstract:

Mg-3Al-1Zn (AZ31) alloy samples with different starting textures have been processed using Equal Channel Angular Processing (ECAP) at 150°C and 200°C. The common temperature limit for ECAP of wrought AZ31 alloys has been reduced from 200°C to 150°C by suppressing tensile twinning activity. Twinning activity was reduced by either changing the starting texture or increasing the temperature. A crystal plasticity model was utilized to gain a better insight into the operating deformation mechanisms during ECAP. Suppression of tensile twinning and pronounced prismatic slip activity resulted in a crack-free, homogeneous deformation at 150°C. In addition, twinning, when exists, was shown to have a significant effect on the promotion of DRX and shear band formation.

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Periodical:

Advanced Materials Research (Volume 922)

Pages:

108-113

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.922.108

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Online since:

May 2014

Authors:

Ebubekir Dogan*, Matthew W. Vaughan, Ibrahim Karaman

Keywords:

Twinning, Equal Channel Angular Processing, Low Temperature Formability, Magnesium, Texture

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