PROPERTIES AND HEAT TREATMENT OF THE TITANIUM ALLOY TiAl7Mo4

Journal Article · Tue Sep 01 04:00:00 EDT 1959 · Technische Mitteilungen Krupp (West Germany) Divided into Tech. Mitt. Krupp, Forschungsber. and Tech. Mitt. Krupp, Werksber.

OSTI ID:4195622

Knorr, W

The properties of a titanium alloy containing 7% Al and 4% Mo were investigated. In the incandescent state, tensile strengths between 104 and 124 kp/mm/sup 2/ were found. The effect of deformation on the tensile strength and the effect of the deformation on the tensile strength and the effect of the deformation degree and the deformation temperatures on the ductility are greater than the effect of a change of the alloy composition in the concentration range investigated. The tensile properties can be increased by heat treatment so that a good depth hardness can be obtained. The yield point, with increasing quenching temperature, passes through a minimum value at approximately 900 deg C which is apparent with the transformation of the mechanically stable beta phase. Favorable combiniitions of strength and ductility were obtained after quenching from 900 deg C and annealing at 550 deg C. The structural forms arising in the processing and from heat treatment and their relationship with the mechanical properties are described. The best properties at room temperatures have a polygonal ( alpha plus or minus beta ) form which was obtained ivith final deformation at the lowest temperature possible. This fine-grained state possesses, however, relatively poor creep properties, but transformation yields improved values. Some time-state values at 400 and 500 deg C show a relatively high heat resistance for titanium alloys. The embrittlement observed at 500 deg C raises doubts as to the utilization of the alloy for extended use at temperatures over 400 deg C. (tr-auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-14-012029
• OSTI ID: 4195622
• Journal Information: Technische Mitteilungen Krupp (West Germany) Divided into Tech. Mitt. Krupp, Forschungsber. and Tech. Mitt. Krupp, Werksber., Journal Name: Technische Mitteilungen Krupp (West Germany) Divided into Tech. Mitt. Krupp, Forschungsber. and Tech. Mitt. Krupp, Werksber. Vol. Vol: 17; ISSN TMKRA
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

ALLOYS
ALUMINUM ALLOYS
ANNEALING
BRITTLENESS
CREEP
DEFORMATION
DUCTILITY
GRAIN SIZE
HARDNESS
HEAT RESISTING METALS
HEAT TREATMENTS
HIGH TEMPERATURE
LATTICES
MECHANICAL PROPERTIES
METALS, CERAMICS, AND MATERIALS
MOLYBDENUM ALLOYS
PHASE DIAGRAMS
QUENCHING
STABILITY
TEMPERATURE
TENSILE PROPERTIES
THERMODYNAMICS
THICKNESS
TITANIUM ALLOYS
USES