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Influence of ECAP-Back Pressure on the Porosity Distribution

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Bidulská J., Kvačkaj T., Kočiško R., Bidulský R., Actis Grande M., Donič T., Martikán M.
Acta Physica Polonica A
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2010
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vol. 117
|
issue 5
864-868
EN
The main aim of this paper is to show how back pressure equal channel angular pressing (ECAP-BP) influences the porosity distribution in powder metallurgy (PM) aluminium alloys. When back pressure is applied, the accumulation of damage in deformed samples decreases due to the fact that the shear strain takes place under predominantly compressive stresses. Consequently, ECAP-BP influences the porosity distribution in terms of the severe shear deformation involved. According to the obtained results, interesting applications for this new progressive method in physical and metallurgical research fields are shown.
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