Microstructure and Phase Relations for Ti-Mo-Al Alloys.
Abstract
The influence of aluminum additions to a titanium-7 at % molybdenum alloy on the phase equilibria was investigated. The microstructures of the alloys, Ti-7% Mo-7% Al, and Ti-7% Mo-16% Al, were determined by light and electron microscopy. It was found that with increasing aluminum concentration the formation of the metastable omega phase was suppressed. In the Ti-7% Mo-16% Al alloy the beta phase decomposed upon quenching by precipitating coherent, ordered particles having a CsCl type of crystal structure (beta sub 2). At low temperatures the equilibrium phases for this alloy were beta + alpha + beta sub 2, whereas at high temperature (850C-950C) the Ti3Al phase was in two-phase equilibrium with the beta phase. The four-phase equilibrium which exists at a temperature of about 550C involves the reaction beta + Ti3Al reversibly yield alpha + beta sub 2. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1971
- Accession Number
- AD0768404
Entities
People
- G. Lutjering
- S. Weissmann
- T. Hamajima
Organizations
- Rutgers University–New Brunswick