Investigation into the metallurgical aspects of joining rapidly-solidified aluminum alloys. Final report, September 1984-December 1987

Technical Report · Thu Mar 31 23:00:00 EST 1988

OSTI ID:6845980

Baeslack, W A

Research performed during this program demonstrated that the metastable microstructures upon which rapidly-solidified, powder metallurgy (RS/PM) aluminum alloys depend for their unique mechanical properties can be both recreated using rapid-solidification fusion-welding processes and/or retained using solid-state welding processes. Alloys investigated included Al-Fe-X dispersoid-type compositions developed for superior elevated-temperature properties and Al-Li-X alloys developed for high strength and modulus and low density. Processes found to be most effective for the joining of these alloys included rapid-solidification electron beam and capacitor-discharge welding and solid-state inertia-friction and diffusion welding. Metallurgical phenomena investigated included solidification, solid-state phase transformations, defect formation, and structure-property-fracture relationships. RS/PM aluminum alloys which contain low hydrogen levels, such as the inertly produced Al-8Fe-2Mo alloy, were effectively joined using the high-energy density electron-beam welding.

• Research Organization: Ohio State Univ. Research Foundation, Columbus (USA)
• OSTI ID: 6845980
• Report Number(s): AD-A-194677/1/XAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CERIUM ALLOYS
CRYSTAL STRUCTURE
DENSITY
DOCUMENT TYPES
ELECTRON BEAM WELDING
ELEMENTS
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HYDROGEN
IRON ALLOYS
JOINING
LITHIUM ALLOYS
MATERIALS
MECHANICAL PROPERTIES
METALLURGY
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NONMETALS
PHYSICAL PROPERTIES
POWDER METALLURGY
PROGRESS REPORT
RARE EARTH ALLOYS
WELDING