THE STRUCTURE, MECHANICAL PROPERTIES AND DEFORMATION BEHAVIOR OF Ti-Al AND Ti-Al-X ALLOYS,
Abstract
Strengthening due to the precipitation of the ordered alpha sub 2 phase (based on Ti3X) was studied in binary and ternary Ti-Al-X3(where X = Sn, Ga, In or Pb) alloys. The observed strengthening can be separated into two principal components; one due to the dislocation/ordered particle interaction and the other due to dislocation/precipitate 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 Ti3(Al0.5Ga0.5) and Ti3(Al0.25Ga0.75) 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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1969
- Accession Number
- AD0698173
Entities
People
- J. C. Williams
- M. J. Blackburn
Organizations
- Boeing