Investigation of the effects of microstructure on creep deformation in α2-based titanium aluminide intermetallics |
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| Authors: | W O SOBOYEJO R J LEDERICH D S SCHWARTZ |
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| Affiliation: | (1) Department of Materials Science and Engineering, The Ohio State University, 116 West, 19th Avenue, Columbus, OH 43210, USA;(2) McDonnell Douglas Corporation, P. O. Box 516, St. Louis, MO 63166, USA |
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| Abstract: | The results of a systematic investigation of the effects of microstructure/substructure on the secondary creep behaviour of
α2-based titanium aluminide alloys are presented. This includes a study of the effects of heat treatment on the steady-state
creep behaviour of α2+β-processed Ti-24Al-11Nb and Ti-25Al-10Nb-3V-1Mo at 540, 650 and 760°C, and an investigation of the
effects of creep deformation on dislocation substructures in Ti-24Al-11Nb. The parameters that control secondary creep deformation
are identified for both alloys, and the results are compared with data obtained for conventional high-temperature near-α titanium
alloys and β-forged Ti-24Al-10Nb-3V-1Mo.
This revised version was published online in November 2006 with corrections to the Cover Date. |
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