Development of grain structure during superplastic deformation of an Al-Zn-Mg-Cu-Zr alloy containing Sc
DSpace at IIT Bombay
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Title |
Development of grain structure during superplastic deformation of an Al-Zn-Mg-Cu-Zr alloy containing Sc
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Creator |
MUKHOPADHYAY, AK
KUMAR, A RAVEENDRA, S SAMAJDAR, I |
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Subject |
RECRYSTALLIZATION
ALUMINUM Al-Zn-Mg-Cu-Zr-Sc alloy Two-step strain rate Superplasticity Transmission electron microscopy Electron backscattered diffraction |
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Description |
Recent studies have shown that a suitably thermomechanically processed Al-Zn-Mg-Cu-Zr-Sc alloy having an essentially unrecrystallized grain structure may be subjected to superplastic deformation at a temperature and strain rate combination of 475 degrees C, 1.9 x 10(-2) s(-1) to obtain a total elongation of 650%. The present work demonstrates that the utilization of two-step strain rate at 425 degrees C during superplastic deformation of a similarly thermomechanically processed alloy increases the total elongation value to as high as 916%. The beneficial effect of two-step strain rate could further be realized at 350 degrees C to obtain a total elongation of 438%. Using electron backscattered diffraction, the present work provides a systematic assessment of the changes in (i) percentage recrystallization and (ii) recrystallized grain size with percentage elongation in the material superplastically deformed using both one- and two-step strain rates. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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Publisher |
PERGAMON-ELSEVIER SCIENCE LTD
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Date |
2012-06-26T08:29:38Z
2012-06-26T08:29:38Z 2011 |
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Type |
Article
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Identifier |
SCRIPTA MATERIALIA,64(5)386-389
1359-6462 http://dx.doi.org/10.1016/j.scriptamat.2010.10.038 http://dspace.library.iitb.ac.in/jspui/handle/100/14184 |
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Language |
English
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