Texture Change during Superplastic Deformation in Fine-Grained Magnesium Alloys

Abstract:

Texture change during superplastic deformation was examined and compared in two magnesium alloys with different chemical composition. These alloys were extruded to refine the microstructure. The pre-existing basal texture of both alloys became slightly more random within the bulk probably owing to grain boundary sliding and the accompanying grain rotation. However, the texture changes differed between tensile and compressive deformation along the extrusion (longitudinal) direction. This fact suggests that dislocation slip is important in superplastic deformation. It was concluded that dislocation slip acts primarily as an accommodation mechanism for grain boundary sliding.

• Periodical: Materials Science Forum (Volumes 838-839)
• Pages: 59-65
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.838-839.59
• Online since: January 2016
• Authors: Hiroyuki Watanabe*, Tokuteru Uesugi, Yorinobu Takigawa, Kenji Higashi
• Keywords: EBSD, Magnesium Alloys, Slip-Accommodation, Texture

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