Influence of ECAP-Back Pressure on the Porosity Distribution
J. Bidulskáa, T. Kvačkaja, R. Kočiškoa, R. Bidulskýb, M. Actis Grandeb, T. Doničc and M. Martikánc
a Technical University of Košice, Faculty of Metallurgy, Letná 9, 042 00 Košice, Slovakia
b Politecnico di Torino-Alessandria Campus, V. Teresa Michel 5, 15100 Alessandria, Italy
c University of Žilina, Faculty of Mechanical Engineering, Univerzitná 1, 010 26 Žilina, Slovakia
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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.
DOI: 10.12693/APhysPolA.117.864
PACS numbers: 81.05.Bx, 81.20.Ev, 81.40.-z, 81.70.Fy