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, Journal Name: Metallurgical Transactions, A Journal Issue: 10 Vol. 26; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

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