Superplastic behavior in a mechanically alloyed aluminum composite reinforced with SiC particulates

Journal Article · Tue Dec 31 23:00:00 EST 1991 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(92)90170-J· OSTI ID:5700147

Higashi, K; Okada, T; Mukai, T; Tanimura, S; Nieh, T G; Wadsworth, J ^[1]

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1. Osaka Prefecture, University, Sakai, (Japan) Lockheed Missiles and Space Co., Inc., Research and Development Div., Palo Alto, CO (United States)

The discovery of very-high-strain-rate superplasticity in a mechanically alloyed 15 vol pct SiCp/IN9021 aluminum composite is reported. Tensile elongations of more than 500 pct were obtained at strain rates between 5 to 100/s at 823 K. The maximum elongation of 610 pct was recorded at 6/s and 823 K. The potential for high-strain-rate superplasticity in this mechanically alloyed composite is found to be superior to a number of other reinforced aluminum composites. In particular, the superplastic strain rates were many orders of magnitude higher than those for typical superplastic alloys. It is demonstrated that mechanically alloyed composites can exhibit superplasticity in the very high strain rate over 1/s. 13 refs.

• OSTI ID: 5700147
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 26; ISSN SCRME; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALLOYS
ALUMINIUM ALLOYS
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
FRACTURE MECHANICS
MATERIALS
MATRIX MATERIALS
MECHANICAL PROPERTIES
MECHANICS
PARTICLES
PARTICULATES
PLASTICITY
REINFORCED MATERIALS
SILICON CARBIDES
SILICON COMPOUNDS
STRAIN RATE