Accession Number:

AD0698173

Title:

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

Descriptive Note:

Corporate Author:

BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH

Personal Author(s):

Report Date:

1969-09-01

Pagination or Media Count:

31.0

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

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE