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ALLOY CHARACTERIZATION STUDIES OF ALUMINUM POWDER METALLURGY (APM) PRODUCTS UTILIZING THE ELECTRON MICROSCOPE

Technical Report ·
OSTI ID:4100275
The strength characteristics of APM products are dependent upon fabrication history and the size and distribution of the aluminum oxide particles. Evaluation of APM products produced by the Swiss (AIAG's SAP-930), and the U. S. (Alcoa's XAP-005) was accomplished by electron microscopy techniques utilizing replicas and thin sections. Comparisons between the two materials were made with respect to size and distribution of the oxide particles, and size and number of iron-rich inclusions. The oxide particles ranged from 0.025 to 1.6 microns. The larger particles appeared to be agglomerates of many smaller particles. The spacing between particles ranged from 0.1 to 0.3 microns. These values were equal for SAP-930 and XAP-065. SAP-930 revealed a greater number of oxide particle aglomerates, in addition to more and larger aluminum-rich areas than XAP- 005. Comparisons of the inclusions showed a greater number and larger inclusion sizes in SAP-930 than in XAP-005. Based on preliminary data, the XAP-005 (Alcoa) appears superior to the SAP-930 (AIAG) with respect to homogeneity of particle size and distribution. More work is recommended to characterize the two alloys throughout various stages of fabrication, and to correlate microstructure with mechanical properties. (auth)
Research Organization:
Atomics International. Div. of North American Aviation, Inc., Canoga Park, Calif.
DOE Contract Number:
AT(11-1)-GEN-8
NSA Number:
NSA-18-012649
OSTI ID:
4100275
Report Number(s):
NAA-SR-Memo-8598
Country of Publication:
United States
Language:
English

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Related Subjects

ALUMINUM
ALUMINUM ALLOYS
ALUMINUM OXIDES
DISTRIBUTION
ELECTRON MICROSCOPY
FABRICATION
IMPURITIES
INCLUSIONS
IRON
MECHANICAL PROPERTIES
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
POWDER METALLURGY
REPLICA TECHNIQUES
SAP
SINTERED MATERIALS
TENSILE PROPERTIES
THICKNESS