Abstract
In this paper, the low-cycle fatigue behavior of commercially pure aluminum severely deformed through equal channel angular pressing was studied by the use of data gathered from rotating-bending tests. After designing and manufacturing a suitable die, four passes of severe plastic deformation through strain path B c were successfully performed on aluminum samples. The annealed and processed samples were then subjected to simple tensile test, Vickers hardness test and rotating-bending fatigue test. The results showed a significant increase in the hardness and yield strength of processed samples but also a significant decrease in their ductility. A simple mathematical analysis was used to calculate the plastic strain applied in the fatigue test, and then the strain–life curves were plotted for the low-cycle region. The plotted strain–life curves showed that, as compared with annealing, the equal channel angular pressing process greatly reduces the transition fatigue life (N t) of commercially pure aluminum. Examination of Coffin–Manson curves obtained for samples subjected to annealing and severe plastic deformation revealed that equal channel angular pressing has an undesirable effect on the low-cycle fatigue of commercially pure aluminum and decreases the fatigue life in this region.
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Limooei, M.B., Zandrahimi, M. & Ebrahimi, R. Low-Cycle Fatigue Behavior of Al1070 Severely Deformed by Equal Channel Angular Pressing Process. Iran J Sci Technol Trans Mech Eng 42, 99–105 (2018). https://doi.org/10.1007/s40997-017-0085-1
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DOI: https://doi.org/10.1007/s40997-017-0085-1