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Macroscopic Shear Banding in an Aluminum-Based Alloy During Equal-Channel Angular Pressing

Published online by Cambridge University Press:  14 March 2011

Jingtao Wang ,
Yuzhong Xu ,
Lizhong Wang ,
Xicheng Zhao  and
Haibo Wang
Jingtao Wang
Affiliation:
School of Metall., Xi'an Univ. of Arch. & Tech., 710055, P.R.China
Yuzhong Xu
Affiliation:
School of Metall., Xi'an Univ. of Arch. & Tech., 710055, P.R.China
Lizhong Wang
Affiliation:
Now at School of Mech. Engineer., Xi'an Jiaotong University, 710049, P.R. China
Xicheng Zhao
Affiliation:
School of Metall., Xi'an Univ. of Arch. & Tech., 710055, P.R.China
Haibo Wang
Affiliation:
School of Metall., Xi'an Univ. of Arch. & Tech., 710055, P.R.China
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Abstract

Equal-channel angular pressing is now recognized as an effective technique for fabricating materials with ultrafine structures. It is generally considered that the strain is homogeneously distributed in the materials after ECA pressing. The present investigation shows, however, that severe macroscopic shear band, which extends from bottom to top surface and slants to the longitudinal axis of specimen at an angle of about 45°, develops at regular intervals, with a high shear strain accommodation of about 3.7 within the band. Different families of macroscopic shear bands may cut across each other, and the total volume fraction of macroscopic shear bands may well surpass 50%.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 683: Symposium BB – Materials Instabilities and Patterning in Metals , 2001 , BB3.1.1
Copyright
Copyright © Materials Research Society 2001

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