An electron backscatter diffraction analysis of the microstructure of pure aluminum processed by equal-channel angular pressing
By: Shannon Derek Terhune
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1998
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 53
Description: Equal-channel angular (ECA) pressing is a promising method to achieve refinement of grain size to 1.0      micrometer or less for aluminum and its alloys. Computer-aided electron backscatter diffraction (EBSD)      analysis of high purity aluminum (99.99%) which had been subjected to one pass, four passes, and twelve      passes through an ECA die was performed. Grain and subgrain size and boundary misorientation distributions      during such large-strain deformation processing were of particular interest. A texture was present after one      pressing and the boundary misorientation distribution had a peak at 5 deg - 10 deg although boundaries were      present in all misorientation ranges. Fine equaixed grains were achieved after twelve passes through the ECA      die, accompanied by random orientation and misorientation distributions.
Notes: "December 1998."

Thesis advisor(s): Terry R. McNelley.

Thesis (M.S. in Mechanical Engineering) Naval Postgraduate School, December 1998.

Includes bibliographical references (p. 49-51)

Approved for public release; distribution unlimited.

Also available online.

Mode of access: World Wide Web.

System requirements: Adobe Acrobat reader.

US Navy (USN) author.

dk/dk cc:9116 3/4/99.