Effect of back pressure during equal-channel angular pressing on deformation-induced porosity in copper
Effect of back pressure during equal-channel angular pressing on deformation-induced porosity in copper
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DOI：
10.1016/j.scriptamat.2013.02.034
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发表时间：
2013-06
影响因子：
6
通讯作者：
Jens Ribbe;G. Schmitz;H. Rösner;R. Lapovok;Y. Estrin;G. Wilde;S. Divinski
中科院分区：
文献类型：
--
作者：
Jens Ribbe;G. Schmitz;H. Rösner;R. Lapovok;Y. Estrin;G. Wilde;S. Divinski
研究了等通道转角挤压（ECAP）过程中背压对变形诱导气孔的影响。在无反压条件下，4道次ECAP变形后，试样中出现明显的孔隙，而施加200 MPa反压时，试样中没有出现渗流现象。但当带背压的ECAP变形持续到8道次时，出现了气孔。本文讨论了严重变形材料中的膨胀孔隙的性质。
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 200MPa 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.