THE STRUCTURE, MECHANICAL PROPERTIES AND DEFORMATION BEHAVIOR OF Ti-Al AND Ti-Al-X ALLOYS,

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Abstract:

Strengthening due to the precipitation of the ordered alpha sub 2 phase based on Ti3X was studied in binary and ternary Ti-Al-X3where X Sn, Ga, In or Pb alloys. The observed strengthening can be separated into two principal components one due to the dislocationordered particle interaction and the other due to dislocationprecipitate stress field interactions. The former of these appears more important in some cases, e.g., Ti-Al-Sn alloys whereas the latter appears to predominate in other cases, e.g., Ti-Al-Ga alloys. The brittleness of single phase Ti3Al was shown to be related to slip morphology and the decreased extent of 11 -2 3 glide with increasing Al content. The marked improvement in strength and ductility of the Ti3Al0.5Ga0.5 and Ti3Al0.25Ga0.75 compounds results from the phase separation into alpha sub 2 Ti2Ga with an accompanying change in slip morphology and an increase in the extent of 11 -2 3 glide. Author

Author(s):
Williams, J. C. ; Blackburn, M. J.
Author Organization(s):
BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH
Supplementary Note:
Prepared in cooperation with North American Rockwell Corp., Thousand Oaks, Calif.
Pagination:
0031

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
D1-82-0928
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*TITANIUM ALLOYS, METALLOGRAPHY), ALUMINUM ALLOYS, GALLIUM ALLOYS, TIN ALLOYS, INDIUM ALLOYS, LEAD ALLOYS, PHASE STUDIES, DISPERSION HARDENING, MICROSTRUCTURE, DISLOCATIONS, DEFORMATION, PHASE DIAGRAMS, MECHANICAL PROPERTIES
Field(s)/Group(s):
Properties of Metals and Alloys
Report Date:
1969 Sep 01