An examination of microtexture and microstructure in ultrafine-grained nickel
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Authors
Zhilyaev, A.P.
Baró, M.D.
Langdon, T.G.
McNelley, T.R.
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Date of Issue
2004
Date
2004
Publisher
Monterey, California. Naval Postgraduate School
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Abstract
A detailed orientation imaging microscopy (OIM) investigation was conducted to evaluate
the microstructural characteristics in samples of pure nickel processed using three different
procedures of severe plastic deformation (SPD): equal-channel angular pressing (ECAP), highpressure
torsion (HPT) and a combination of ECAP and HPT. Electron backscattering diffraction
(EBSD) techniques were employed to measure the microtextures and the distributions of the
misorientation angles. A thorough analysis of the microtexture revealed the shear plane normal
and shear direction for UFG nickel obtained by various kinds of severe plastic deformation. It is
shown that a combination of ECAP and HPT leads both to a greater refinement in the microstructure
and to a smaller fraction of boundaries having low angles of misorientation.
Type
Article
Description
Rev.Adv.Mater.Sci. 7(2004) 41-49
Series/Report No
Department
Mechanical Engineering
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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.