Creep and Mechanical Properties of a Commercial Aluminum Alloy Processed by ECAP

Cheng Xu; Terence G. Langdon

doi:10.4028/www.scientific.net/MSF.503-504.77

Paper Titles

On the Microstructure of HPT Processed Cu under Variation of Deformation Parameters
p.51

Deformation Induced Vacancies with Severe Plastic Deformation: Measurements and Modelling
p.57

Influence of Processing Parameters on Texture and Microstructure in Aluminum after ECAP
p.65

Processing of Ultrafine-Grained Cu-Fe-Cr Composite by Equal Channel Angular Pressing
p.71

Creep and Mechanical Properties of a Commercial Aluminum Alloy Processed by ECAP
p.77

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
p.91

Texture Formation during ECAP of Aluminum Alloy AA 5109
p.99

Influence of Cu on the Mechanical Properties of an Al-4.4wt%Mg Alloy after ECAP
p.107

HomeMaterials Science ForumMaterials Science Forum Vols. 503-504Creep and Mechanical Properties of a Commercial...

Creep and Mechanical Properties of a Commercial Aluminum Alloy Processed by ECAP

Abstract:

A commercial spray-cast aluminum alloy, having a composition of Al-11.5% Zn-2.5% Mg-0.9% Cu-0.2% Zr, was processed by equal-channel angular pressing (ECAP) to give an ultrafine-grained microstructure with a grain size of ~0.3 μm and a fracturing of the rod-shaped MgZn2 precipitates. The mechanical properties of the alloy were investigated using microhardness testing at ambient temperature and tensile testing at a temperature of 673 K. In addition, creep tests were conducted using a double-shear testing facility at temperatures from 473 to 673 K. The results show the microhardness decreases with increasing numbers of passes in ECAP and high strain rate superplasticity is achieved after processing by ECAP at 473 K for 6 or 8 passes. A maximum elongation of >1000% was recorded at a strain rate of 10-2 s-1 when testing at 673 K. The creep tests show the creep rates are faster in the as-pressed material than in the as-received material when testing at the same applied stress and testing temperature.

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Periodical:

Materials Science Forum (Volumes 503-504)

Pages:

77-82

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.503-504.77

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Online since:

January 2006

Authors:

Cheng Xu, Terence G. Langdon

Keywords:

Aluminium Alloy, Creep, Equal-Channel Angular Pressing (ECAP), Mechanical Property

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