期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 142, 期 1, 页码 182-185出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2013.06.055
关键词
Alloys; Hot working; Electron microscopy; Mechanical testing; Creep; Ductility
资金
- MICINN [MAT2009-14452, MAT2012-38962]
- CSIC
An Al-Zn-Mg-Cu alloy was friction stir processed over two kinds of backing anvils, at two different cooling rates. A finer grain size, 0.3 vs 0.5 mu m, was obtained by processing at the highest cooling rate. Both materials showed superplastic behavior with a maximum elongation to fracture of about 510%. Grain boundary sliding was the operative deformation mechanism. Furthermore, the finer grain size material showed high strain rate superplasticity, at 10(-2) s(-1), at lower temperatures, as low as 250 degrees C. (C) 2013 Elsevier B.V. All rights reserved.
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