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Mechanical and Structural Properties of High Purity Al Processed by ECAP

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Kvačkaj T., Kočiško R., Pokorný I., Bidulská J., Kvačkaj M., Kováčová A., Bidulský R., Lityńska-Dobrzyńska L., Dutkiewicz J.
Acta Physica Polonica A
|
2012
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vol. 122
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issue 3
557-560
EN
The mechanical properties and substructure formation of high purity aluminium (99.999%) processed by severe plastic deformation method (equal channel angular pressing) were studied. The equal channel angular pressing process was carried out at room temperature by route C (sample rotation around the axis about 180° after each pass) in a die with two channels intersecting at an angle of Φp = 90. The softening mechanism through dynamic recovery was recognized up to 6th equal channel angular pressing pass, however, after that the mechanical strengthening was revealed. The samples after equal channel angular pressing processing were annealed in different temperature and time conditions. The influence of annealing temperature and time on microhardness as well as diameter of grain size were investigated in samples processed by the 4th equal channel angular pressing pass.
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