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http://dx.doi.org/10.3740/MRSK.2003.13.12.819

High Temperature Deformation Behavior of Sc Added Al-7.7wt%Zn-2.0wt%Mg-1.9wt%Cu Alloy  

Woo, Kee-Do (Division of Advanced Materials Engineering, The Research Center of Advanced Materials Development, Chonbuk National University)
Ryu, Yong-Seok (Division of Advanced Materials Engineering, The Research Center of Advanced Materials Development, Chonbuk National University)
Kim, Sug-Won (Division of Advanced Materials Engineering, The Research Center of Advanced Materials Development, Chonbuk National University)
Deliang Zhang (Department of Materials and Process Engineering, University of Waikato)
Publication Information
Korean Journal of Materials Research / v.13, no.12, 2003 , pp. 819-824 More about this Journal
Abstract
The Al-7.7Zn-2.0Mg-1.9Cu-0.1Zr-0.1Sc alloy exhibited excellent elongation by the new thermomechanical treatment (TMT) process; solution treatment and furnace cooling\longrightarrowhot and cold rolling and then annealing for short time. Tensile test at high temperature from 430 to $500^{\circ}C$ has been performed with various strain rates using for the Al-7.7Zn-2.0Mg-1.9Cu-0.1Zr-0.1Sc alloy obtained by the TMT process. The elongation of the Al-7.7Zn-2.0Mg-1.9Cu-0.1Zr-0.1Sc was 550% tensile tested at $470^{\circ}C$ temperature and 2.2 $\times$ $10^{-3}$ $s^{-1}$ strain rate. The m value of Al-7.7Zn-2.0Mg-1.9Cu-0.1Zr-0.1Sc alloy deformed 85% increased from 0.33 to 0.46 with increasing total elongation. This new TMT process was very simple and easy to make the sheets in the company.
Keywords
High temperature deformation; superplasticity; aluminum alloy; TMT;
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