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Enhanced mechanical properties in ultrafine grained 7075 Al alloy

Published online by Cambridge University Press:  03 March 2011

Y.H. Zhao ,
X.Z. Liao ,
Y.T. Zhu  and
R.Z. Valiev
Y.H. Zhao
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
X.Z. Liao
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Y.T. Zhu*
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
R.Z. Valiev
Affiliation:
Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, 450000 Ufa, Russian Federation
*
a) Address all correspondence to this author. e-mail: yzhu@lanl.gov
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Abstract

Highest strength for 7075 Al alloy was obtained by combining the equal-channel-angular pressing (ECAP) and natural aging processes. The tensile yield strength and ultimate strength of the ECAP processed and naturally aged sample were 103% and 35% higher, respectively, than those of the coarse-grained 7075 Al alloy counterpart. The enhanced strength resulted from high densities of Guinier–Preston (G-P) zones and dislocations. This study shows that severe plastic deformation has the potential to significantly enhance the mechanical properties of precipitate hardening 7000 series Al alloys.

Keywords

AlloyCold workingMechanical properties
Type
Rapid Communications
Information
Journal of Materials Research , Volume 20 , Issue 2 , February 2005 , pp. 288 - 291
Copyright
Copyright © Materials Research Society 2005

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