Effect of back pressure during equal-channel angular pressing on deformation-induced porosity in copper
Version 2 2024-06-04, 05:21Version 2 2024-06-04, 05:21
Version 1 2015-08-20, 15:35Version 1 2015-08-20, 15:35
journal contribution
posted on 2024-06-04, 05:21authored byJ Ribbe, G Schmitz, H Rösner, Rimma LapovokRimma Lapovok, Y Estrin, G Wilde, SV Divinski
The effect of back pressure during equal channel angular pressing (ECAP) on deformation-induced porosity is investigated. While percolating porosity was found after 4 ECAP passes in the absence of back pressure, no percolation was detected when a back pressure of 200 MPa was applied. However, after ECAP with back pressure continued to 8 passes, percolating porosity did appear. The nature of the percolating porosity developed in severely deformed materials is discussed.