Effect of strain path on evolution of deformation bands during ECAP of pure aluminum

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Authors
Oh-ishi, K.
Zhilyaev, A. P.
McNelley, T. R.
Subjects
Aluminum
Equal channel angular pressing (ECAP)
Texture
Simple shear
Orientation imaging microscopy (OIM)
Advisors
Date of Issue
2005-03-20
Date
Publisher
Elsevier
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Abstract
The influence of strain path during equal channel angular pressing (ECAP) has been evaluated in pure aluminum by orientation imaging microscopy (OIM) and transmission electron microscopy (TEM). The material was examined after four pressing operations by route BC in a 90◦ die, or eight pressing operations by route BC in a 135◦ die. The von Mises equivalent strains were essentially the same for these two ECAP procedures. The microtexture data indicate that the distortion during ECAP corresponds to a simple shear in a direction approximately parallel to die-channel exit and on a plane perpendicular to the flow plane. For both procedures, the OIM data reveal prominent meso-scale band-like features. Lattice orientations in each band correspond to a texture orientation but the particular combinations of orientations depend upon ECAP die angle.High-angle boundaries in the structure correspond to interfaces between the bands.
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Article
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https://hdl.handle.net/10945/43161
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Citation
Materials Science and Engineering A, v. 410-411, 2005, pp.83-187
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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