INVESTIGATION TO DEVELOP OPTIMUM PROPERTIES IN FORGED Ti-7Al-4Mo. Period covered: February 1958 to June 1960

Technical Report · Wed Jun 01 00:00:00 EDT 1960

OSTI ID:4114053

Hamer, J E

The influence of six processing sequences on the microstructure, mechanical properties. and heat treatment response of the alloy Ti-7Al-4Mo was studied. Forging entirely above the beta transus produced a Widmanstatten type of structure. The creep resistance of this structure was excellent: however, heat treatment response and tensile ductility were poor. Forging entirely below the beta transus developed an equiaxed microstructure and generally good properties except for reduced creep resistance. Duplex forging, i.e., forging initially above the beta transus, cooling to room temperature, and reheating to below the beta transus for finish forging. produced a nearly equiaxed microstructure and general property levels quite similar to all below beta forging but with improved creep resistance. (auth)

• Research Organization: Crucible Steel Co. of America. Midland Research Lab., Penna.
• NSA Number: NSA-15-007730
• OSTI ID: 4114053
• Report Number(s): WADD-TR-60-489
• Country of Publication: United States
• Language: English

Related Subjects

ALUMINUM ALLOYS
CREEP
DUCTILITY
FORGING
HEAT TREATMENTS
MECHANICAL PROPERTIES
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM ALLOYS
PHASE DIAGRAMS
TITANIUM ALLOYS
WIDMANSTAETTEN STRUCTURE