Temperature dependence of the deformation and oxidation behavior of an age-hardenable beta + alpha-two titanium alloy. Technical report

Technical Report · Fri Mar 05 04:00:00 EST 1993

OSTI ID:6449678

Goto, D M; Quattrocchi, L S; Koss, D A

The beta Ti alloy Ti-23Nb-11Al (at %) is unique in that it is age hardenable due to the formation of lath-like alpha 2-phase precipitates based on Ti3Al. Furthermore age-hardening occurs at temperatures significantly higher than most conventional beta Ti alloys. This suggests the possibility of the elevated temperature usage of alpha 2-strengthened beta Ti alloys such as Ti-23Nb-11Al. The study examines the compressive deformation behavior of the Ti-23Nb-11Al alloy in the -196 deg. C to 650 deg. C temperature range and demonstrates that very high strengths are possible even at 600 deg. C by precipitation hardening due to the (alpha 2 phase). The thermogravimetric oxidation behavior in laboratory air from 600 deg to 700 deg. C indicates parabolic behavior consistent with oxygen diffusion through a scale.

• Research Organization: Pennsylvania State Univ., University Park, PA (United States). Dept. of Materials Science and Engineering
• OSTI ID: 6449678
• Report Number(s): AD-A-262232/2/XAB; TR--5; CNN: N00014-91-J-1414
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
AGE HARDENING
ALLOYS
ALUMINIUM ALLOYS
CHEMICAL REACTIONS
DEFORMATION
DIFFUSION
DISPERSION HARDENING
HARDENING
INTERMETALLIC COMPOUNDS
LATHES
MACHINE TOOLS
NIOBIUM ALLOYS
OXIDATION
PRECIPITATION HARDENING
TEMPERATURE DEPENDENCE
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
TOOLS