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Autori: G. Gurãu, C. Gurãu, F. M. Braz Fernandes, L. G. Bujoreanu
Editorial: Indian Journal of Engineering and Materials Sciences, 21(3), p.253-258, 2014.
The present paper aims to identify a sequence of bulk-deformation processes able to produce sufficient quantities of ultra fine grained (UFG) volume as to be of interest for practical purposes. Samples of aluminum Al 1100alloy (98.41 % Al) were subjected to repetitive equal channel angular pressing (ECAP) at room temperature, up to in eight passes. Severely plastic deformed (SPD) specimens were cold rolled in thin strips which were subjected to structural characterization, calorimetric evaluation and mechanical testing with the aim of monitoring microstructural evolution. The X-ray diffraction (XRD) studies and differential scanning calorimetry (DSC) tests revealed the influence of cold rolling on SPD samples, while tensile testing revealed marked strength increases with the number of rolling passes. Finally, an original technology was introduced which is easy to implement in metallurgical industry in order to provide large amounts of nanostructured strips.
Cuvinte cheie: Severe plastic deformation, equal channel angular pressing, ultra fine grain, cold rolling, aluminum