Deformation banding and grain refinement in FCC materials
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Authors
Swisher, Douglas Lee
Subjects
Grain Refinement
Ultra-fine Grains
Deformation Banding
Plastic Deformation
Severe Plastic Deformation
Misorientation Angle
Orientation Imaging Microscopy
Electron Backscatter Diffraction
Equal-Channel Angular Pressing
Supral 2004
Nano Structures
Transmission Electron Microscopy
Ultra-fine Grains
Deformation Banding
Plastic Deformation
Severe Plastic Deformation
Misorientation Angle
Orientation Imaging Microscopy
Electron Backscatter Diffraction
Equal-Channel Angular Pressing
Supral 2004
Nano Structures
Transmission Electron Microscopy
Advisors
McNelley, T.R.
Dutta, Indranath
Date of Issue
2003-03
Date
March 2003
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
Microscopy methods in the scanning and transmission electron microscopes have been employed to assess microstructures developed by deformation processing of selected face centered cubic (FCC) materials. Grain maps constructed from orientation data and analysis of transmission data illustrate the presence of fine grains and deformation bands in which the lattice orientation contains symmetric variants of a texture component. A banded, deformation microstructure is present to various degrees in FCC material systems irrespective of processing and material composition. The specific components of the deformation bands were observed to vary depending upon processing conditions of the material and the specific material. Single component and entire deformation textures from shear and plane strain, were both observed. The highangle (40ﾰ-62.8ﾰ) interfaces or boundaries in the microstructure evolve from the interfaces between the bands while the lower-angle (2ﾰ-15ﾰ) boundaries tend to separate cells within the bands. Models of microstructural development that include deformation banding during cold working may be employed to describe both texture development and the origin of the high-angle grain boundaries.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Identifiers
NPS Report Number
Sponsors
Funding
Format
xii, 167 p. : ill. (some col.) ; 28 cm.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
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.