Lattice parameters and Debye-Waller factors of -TiAl alloys
By: by Sarath K. Menon, Alan G. fox
Contributors: Fox, Alan G.; Naval Postgraduate School (U.S.). Dept. of Mechanical Engineering
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1994
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 13
Subjects: PHASE STUDIES; BINARY ALLOYS; TITANIUM ALUMINIDE
Other titles: NPS-ME-94-009.
Description: Accurate lattice parameters of the tetragonal gamma-TiAl phase with the L1 structure have      been determined by X-ray diffraction. The results showed that in binary alloys, the A      parameter decreases while the C parameter increases with increasing A1 content. Integrated      X-ray intensity were determined from annealed powder samples with powder size < 5      microns in order to estimate the temperature factors Difficulties associated with such      evaluations due to the effects of extinction are also discussed. In addition, the 110, 111, and      200 structure factor amplitudes of gamma phase Ti-56at. % Al alloy were accurately      determined from critical-voltage electron diffraction measurements. The Debye- Waller      factors determined from X-ray experiments and the critical voltage experiments are      compared and the results discussed.
Notes: Cover title.

"NPS-ME-94-009."

"December 1994."

AD-A288 843.

Includes bibliographical references (p. 8)

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