Metallurgical variables influencing the corrosion susceptibility of a powder metallurgy SiCw/Al composite
Corrosion studies of a powder metallurgy SiC whisker (SiCw)/Al 7091 composite were performed. The plate material, heat treated to T-6 and T-7 tempers, exhibited preferential corrosion of the surface layers. The regions of corrosion susceptibility resulted from improper processing and thermal treatments. Cold-worked regions resulting from extrusion were not completely removed by the conventional solution treatment and thus appeared as more corrosion susceptible. Large void volume fraction and excessive segregation of SiCw was also noted. Electrochemical, microscopic, and analytical techniques were used in these investigations. Attempts were made to remove the cold-worked regions and study the corrosion properties. A comparative analysis of the results is discussed.
- OSTI ID:
- 6545446
- Journal Information:
- Corrosion (Houston); (United States), Vol. 42:12
- Country of Publication:
- United States
- Language:
- English
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Metallurgical variables influencing the corrosion susceptibility of PM 7091 aluminum/SiCw composite
FUNDAMENTAL AND APPLIED RESEARCH AND DEVELOPMENT IN METALLURGY. Progress Report for April 1959
Related Subjects
ALUMINIUM COMPOUNDS
CORROSION RESISTANCE
POWDER METALLURGY
SILICON CARBIDES
CALCULATION METHODS
CHEMICAL PREPARATION
COLD WORKING
COMPOSITE MATERIALS
ELECTROCHEMISTRY
EXTRUSION
HEATING
MICROSCOPY
PLATES
TEMPERING
VOID FRACTION
WHISKERS
CARBIDES
CARBON COMPOUNDS
CHEMISTRY
CRYSTALS
FABRICATION
HEAT TREATMENTS
MATERIALS
MATERIALS WORKING
METALLURGY
MONOCRYSTALS
SILICON COMPOUNDS
SYNTHESIS
360205* - Ceramics
Cermets
& Refractories- Corrosion & Erosion
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication