The Titanium-Aluminum Phase Diagram. A Review of the Near Ti-50 At.% Al Phase Fields
Abstract
The understanding of the titanium-aluminum (Ti-Al) phase diagram is of great importance to the development of titanium-aluminide alloys and composites for high temperature applications. In this report, the Ti-Al phase diagram near 50 atomic percent (at.%) aluminum is critically reviewed. Murray's Ti-Al phase diagram has been well accepted by the materials community in the late 1980s. Recent results from solidification experiments point toward the existence of a high temperature alpha phase field consistent with two high temperature peritectic reactions (beta + L - alpha + L -* gamma) near 50 at.% aluminum. These reactions are not accounted for in Murray's Ti-Al phase diagram. Close evaluation of the past experimental techniques by which data were utilized in Murray's calculation of the Ti-Al phase diagram revealed areas of uncertainties. These uncertainties are primarily due to the limitation of analytical capabilities available at the time the experiments were performed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1992
- Accession Number
- ADA255685
Entities
People
- Ernest S. Chin
- Ronald R. Biederman