Journal
SCRIPTA MATERIALIA
Volume 164, Issue -, Pages 82-85Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.01.043
Keywords
Aluminum alloys; Electron backscattering diffraction (EBSD); Grain rotation; Thermomechanical processing; Three-dimensional tomography
Categories
Funding
- Aluminium Research Grant Project of Japan Aluminum Association
- JST
- NIMS Microstructural Characterization Platform as a program of Nanotechnology Platform of MEXT, Japan
- [16J04854]
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Grain boundary sliding (GBS) and grain rotation, the predominant mechanisms of superplasticity, were three-dimensionally characterized inside 7475 aluminum alloy (Al-Zn-Mg-Cu) by combining internal oxide markers and three-dimensional (3D) electron backscatter diffraction (EBSD). The internal oxide markers were introduced via hot press bonding of two alloy sheets, hot rolling, cyclic cold rolling, and recrystallization by heat treatments. The microstructures after superplasticity at 500 degrees C and 2 x 10(-4) s(-1) was observed by 3D-EBSD combined with focused ion beam. The 3D-EBSD tomography successfully reconstructed GBS and grain rotation in three dimensions with crystal orientation informations during superplasticity. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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