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Surface layer condition and the fatigue strength of an AZ91 alloy after ball peening |
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| Authors: | Mieczyslaw Korzynski Tomasz Zarski Katarzyna Korzynska |
| Affiliation: | aInstitute of Technology, Faculty of Mathematics and Natural Sciences, Rzeszow University, Aleja Rejtana 16c, 35-959 Rzeszow, Poland;bMechanical Engineering and Aeronautics Faculty, Rzeszow University of Technology, W. Pola 2, 35-959 Rzeszow, Poland |
| Abstract: | The present work compares the states of the surface textures and the oscillatory fatigue strengths of specimens made of an AZ91 alloy after turning and dynamic bearing ball peening. It was found that the specimens ball peened at different time have similar surface geometric structure parameters but different strengthening intensity. It was shown that fatigue strength follows greater peening intensity and random and isotropic surface. It was also ascertained that improving (by peening) the condition of the surface layer means enhancing fatigue strength by 20–87% compared with turning. |
| Keywords: | Fatigue strength limit Ball peening Surface layer properties Surface texture |
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