Ambient Temperature Properties of PM (Powder Metal) Aluminum-Titanium Alloys

The structure and properties of dispersion strengthened aluminum 4 and 6 weight percent titanium powder alloys were investigated as candidate materials for high temperature performance. Alloy rod was extruded from vacuum hot pressed billets of helium gas atomized, mechanically alloyed, and atomized...

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Bibliographic Details
Main Authors: Frazier, William E, Koczak, Michael J
Format: Report
Language:English
Subjects:
ALLOYS
ALUMINUM ALLOYS
BILLETS
CERIUM ALLOYS
DUCTILITY
GASES
HELIUM
HIGH TEMPERATURE
HOT PRESSING
IRON ALLOYS
LOW DENSITY
MECHANICAL PROPERTIES
Metallurgy and Metallography
MICROSTRUCTURE
NOTCH TOUGHNESS
PE62234N
POWDER ALLOYS
POWDER METALS
RODS
STRENGTH(GENERAL)
TEMPERATURE
TITANIUM ALLOYS
VACUUM
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Summary:The structure and properties of dispersion strengthened aluminum 4 and 6 weight percent titanium powder alloys were investigated as candidate materials for high temperature performance. Alloy rod was extruded from vacuum hot pressed billets of helium gas atomized, mechanically alloyed, and atomized plus mechanically alloyed powder. Microstructure and mechanical properties were fully characterized to assess the effect of disperoids on alloy strength, ductility, notch toughness, and modulus. The alloys exhibited low density (2.8g/ cm3), high modulus (85 GPa), good ductility (12%), and strength equivalent to Al-Fe-Ce alloys, e.g., 120 MPa at 250-300 C. Prepared in collaboration with Drexel Univ., Philadelphia, PA.