Microstructural effects on the deformation and fracture of the alloy Ti-25Al-10Nb-3B-1Mo. Final report, 1 July 1988-15 December 1992

Technical Report · Tue Dec 01 00:00:00 EST 1992

OSTI ID:6345302

Ward, C H

The effects of microstructure and temperature on tensile and fracture behavior were explored for the titanium aluminide alloy Ti-25Al-lONb-3V-lMo (atomic percent). Three microstructures were selected for this study in an attempt to determine the role of the individual microstructural constituents. the three microstructures studied were an alpha-2 + beta processed microstructure with a fine Widmanstaetten microstructure, a beta processed microstructure with a fine Widmanstaetten microstructure, and a beta processed microstructure with a coarse Widmanstaetten microstructure. Tensile testing of both round and flat specimens was conducted in vacuum at elevated temperature and in air at room and elevated temperatures. Extensive fractography and specimen sectioning were used to study tensile deformation and the effects of environment on this alloy. Room temperature fracture toughness testing using compact tension specimens was conducted. Elevated temperature toughness testing was performed using J-bend bar specimens in an air environment. Again, extensive fractography and specimen sectioning were used to study the elevated temperature toughening mechanisms of this alloy.... Titanium, Titanium aluminide, Intermetallic, Fracture toughness, Tensile behavior, Fractography environmental interaction.

• Research Organization: Wright Lab., Wright-Patterson AFB, OH (United States)
• OSTI ID: 6345302
• Report Number(s): AD-A-263095/2/XAB; WL-TR-92-4104
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
TITANIUM BASE ALLOYS
FRACTOGRAPHY
MICROSTRUCTURE
TENSILE PROPERTIES
ALUMINIUM ALLOYS
BORON ALLOYS
DEFORMATION
DUCTILITY
EXPERIMENTAL DATA
FRACTURE MECHANICS
METALLURGY
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
SLIP
TEMPERATURE DEPENDENCE
ALLOYS
CRYSTAL STRUCTURE
DATA
INFORMATION
MECHANICAL PROPERTIES
MECHANICS
NUMERICAL DATA
TITANIUM ALLOYS
360103* - Metals & Alloys- Mechanical Properties
360102 - Metals & Alloys- Structure & Phase Studies