High strain rate superplasticity of AlN particulate reinforced 1N90 pure aluminum composite

The superplastic characteristics of 1N90 pure aluminum as well as AlN/1N90 pure aluminum composite, fabricated by P/M method and hot-rolled after extrusion, were investigated. The strain sensitivity (m value) of the AlN/1N90 pure aluminum composites is about 0.3 and the total elongation of the compo...

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Bibliographic Details
Published in:Scripta metallurgica et materialia 1995-10, Vol.33 (8), p.1333-1338
Main Authors: IMAI, T, L'ESPERANCE, G, HONG, B. D, KOJIMA, S
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Deformation, plasticity, and creep
Exact sciences and technology
Materials science
Metals. Metallurgy
Physics
Treatment of materials and its effects on microstructure and properties
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Summary:The superplastic characteristics of 1N90 pure aluminum as well as AlN/1N90 pure aluminum composite, fabricated by P/M method and hot-rolled after extrusion, were investigated. The strain sensitivity (m value) of the AlN/1N90 pure aluminum composites is about 0.3 and the total elongation of the composite of the composite become 100-200% in the strain rate range from 0.02 up to 1.0-1 s at 913K. The 1N90 pure aluminum alone indicates an m value of about 0.45 and the total elongation of 200% in the strain rate range from 0.002-1 s at 913K. Grain sizes of 1N90 pure aluminum alone and AlN/1N90 pure aluminum composite after super plastic deformation are about 2 m. EDS analysis at the interface and on the matrix of the AlN/1N90 pure aluminum composite indicates only aluminum and carbon. The predominant deformation mechanism of both materials is grain boundary sliding.
ISSN:0956-716X
DOI:10.1016/0956-716X(95)00361-X