A Comparison of the Fatigue Life of Shot-Peened 4340M Steel with 100, 200, and 300% Coverage
| Autor: | Ray Toal, C. Alvarez, G. Battel, M. Weaser, Omar S. Es-Said, A. AlSumait, Y. Li, K. Niji |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Diffraction Materials science Scanning electron microscope Mechanical Engineering Peening 02 engineering and technology 021001 nanoscience & nanotechnology Residual Shot peening 01 natural sciences Mechanics of Materials Residual stress Shot (pellet) 0103 physical sciences General Materials Science Composite material 0210 nano-technology |
| Zdroj: | Journal of Materials Engineering and Performance. 28:1780-1789 |
| ISSN: | 1544-1024 1059-9495 |
| DOI: | 10.1007/s11665-019-03891-w |
| Popis: | Shot peening has been widely used for improving the fatigue performance of structural components. The objectives of this study are to increase the fatigue life of 4340M steel by shot peening and to compare performance at three different shot-peening coverages (100, 200, and 300%). The results show that the optimum coverage for 4340M steel is 200% in this experiment. Scanning electron microscopy (SEM) was used to evaluate the microstructural properties and estimate the depth and length of the resulting cracks. A proposed innovative technique, which still needs further verification, was applied to enable SEM to differentiate between the appearances of the three coverages. Residual stresses measured using x-ray diffraction showed that 200% coverage had comparatively the highest residual compressive stresses. |
| Databáze: | OpenAIRE |
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