RESEARCH FOR DEVELOPMENT OF A SUPERIOR TITANIUM ALLOY FOR USE UP TO 1200 F.
Abstract
The objective of this program is to develop and evaluate a superior titanium alloy for use up to 1200 F. Composite materials made up of a mixture of a ductile commercial alloy (Ti-8Al-1Mo-1V) and a brittle, high temperature alloy (Ti-200b-7.5Al) were investigated. The alloys, in the form of high purity shot, were blended and extruded. They were then evaluated by tensile testing between room temperature and 1200 F. Limited studies of 1000 F creep strength, 1200 F oxidation, and thermal stability were also carried out. Strengthening was achieved in tensile tests up to 1000 F. Oxidation resistance and phase compatibility (no interaction) were excellent. Thermal stability was poor in the as-processed condition but improved with heat treatment. Tensile strength at 1200 F and creep strength at 1000 F were not enhanced by the second phase but neither were these properties sharply reduced. Evidence indicates that inherent shortcomings in the Ti-20Cb-7.5Al alloy were responsible. It is felt that the bi-alloy composite concept has demonstrated a solid potential for achieving superior high temperature properties, but that starting compositions and processing conditions must be re-examined before this goal is achieved. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1966
- Accession Number
- AD0484803
Entities
People
- A. K. Wolff
- L. R. Aronin
- S. Abkowitz