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Paper Titles
Deformation Induced Vacancies with Severe Plastic Deformation: Measurements and Modelling
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Influence of Processing Parameters on Texture and Microstructure in Aluminum after ECAP
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Processing of Ultrafine-Grained Cu-Fe-Cr Composite by Equal Channel Angular Pressing
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Creep and Mechanical Properties of a Commercial Aluminum Alloy Processed by ECAP
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An Investigation of Cavitation in the Tensile Testing of a Spray-Cast Aluminum Alloy Processed by ECAP
p.83
Effects of Severe Plastic Deformation: Mechanical Properties and Beyond
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Texture Formation during ECAP of Aluminum Alloy AA 5109
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Influence of Cu on the Mechanical Properties of an Al-4.4wt%Mg Alloy after ECAP
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An Investigation of Deformation in Copper Single Crystals Using Equal-Channel Angular Pressing
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An Investigation of Cavitation in the Tensile Testing of a Spray-Cast Aluminum Alloy Processed by ECAP

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Abstract:

A commercial aluminum 7034 alloy, produced by spray casting and having an initial grain size of ~2.1 μm, was subjected to equal-channel angular pressing (ECAP) through six passes at 473 K. In the as-pressed condition, the microstructure was reasonably homogeneous and the grain size was reduced to an ultrafine grain size of ~0.3 μm. This alloy contains MgZn2 and Al3Zr precipitates which restrict grain growth. In tensile testing at 673 K after processing by ECAP, an elongation of >1000% was achieved at a strain rate of 1.0 × 10-2 s-1 corresponding to high strain rate superplasticity. Quantitative cavity measurements were conducted on the specimens after tensile testing for both the as-received condition and after ECAP. These measurements reveal a significant number of small cavities in the samples and especially in the sample that exhibited a very high elongation. This paper describes the morphology of cavity development in the spray-cast aluminum alloy in both the as-received and as-pressed condition.

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Periodical:

Materials Science Forum (Volumes 503-504)

Pages:

83-90

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.503-504.83

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Online since:

January 2006

Authors:

Megumi Kawasaki, Cheng Xu, Terence G. Langdon

Keywords:

Aluminium Alloy, Cavitation, Equal-Channel Angular Pressing (ECAP), Superplasticity

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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