High strain rate superplasticity of Si{sub 3}N{sub 4} whisker reinforced 7075 alloy matrix composite fabricated by squeeze casting

Journal Article · Thu Jun 01 00:00:00 EDT 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(95)00017-P· OSTI ID:69679

Lim, S W; Nishida, Yoshinori ^[1]

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1. National Industrial Research Inst. of Nagoya (Japan)

The {alpha}-Si{sub 3}N{sub 4} whisker reinforced 7075 aluminum alloy composite which exhibits superplasticity was produced by squeeze casting, followed by hot extrusion to pursue industrial advantages, and following results were obtained: (1) the production of {alpha}-Si3N4 whisker reinforced 7075 aluminum alloy composite which exhibits superplasticity was succeeded by squeeze casting; (2) the composite exhibited a total elongation of 260% at strain rates 0.18 s{sup {minus}1} at 773 K; (3) the superplasticity occurred in the wide range of strain rate from 0.1 to 1 s{sup {minus}1}; (4) the superplasticity occurred in the industrially useful whisker volume fraction range of 20%--30%.

• OSTI ID: 69679
• Journal Information: Scripta Metallurgica et Materialia, Vol. 32, Issue 11; Other Information: PBD: 1 Jun 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
CASTING
TENSILE PROPERTIES
ALUMINIUM BASE ALLOYS
SILICON NITRIDES
ELONGATION
PLASTICITY
FLOW STRESS
EXTRUSION
FRACTURE PROPERTIES
STRAIN RATE
MICROSTRUCTURE