Microstructural stability of the ({alpha} + {beta}) solution-treated and quenched near-{alpha} titanium alloy Ti-5.8Al-4Sn-3.5Zr-0.70Nb-0.50Mo-0.35Si-0.06C

Journal Article · Sun Oct 01 00:00:00 EDT 1995 · Metallurgical Transactions, A

OSTI ID:131448

Ghosal, P; Prasad, R; Ramachandra, C ^[1]

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1. Banaras Hindu Univ., Varanasi (India). Centre of Advanced Study

It can be stated that the lower the solution-treatment temperature (in the range studied) in the ({alpha} + {beta}) phase field followed by oil quenching, the lower is the stability of the resulting microstructure when subjected to aging at 973 K even for a very short time for 2 hours. The term stability is understood in terms of increasing size of the silicide particles that were precipitated and also the {alpha}{sub 2} phase caused by the partitioning of alloying elements. Thus, the observed insensitivity and slower fatigue crack rates in the stabilized condition with the embrittling phases (silicides and {alpha}{sub 2}) in the bimodal microstructures, as opposed to the other investigations, needs further detailed study.

• OSTI ID: 131448
• Journal Information: Metallurgical Transactions, A, Vol. 26, Issue 10; Other Information: PBD: Oct 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
33 ADVANCED PROPULSION SYSTEMS
TITANIUM BASE ALLOYS
MICROSTRUCTURE
ALUMINIUM ALLOYS
TIN ALLOYS
ZIRCONIUM ALLOYS
AIRCRAFT COMPONENTS
MATERIALS
NIOBIUM ADDITIONS
MOLYBDENUM ADDITIONS
SILICON ADDITIONS
CARBON ADDITIONS
INTERMETALLIC COMPOUNDS
PRECIPITATION
TRANSMISSION ELECTRON MICROSCOPY
HCP LATTICES
SOLID SOLUTIONS
INTERFACES
AGING