Stress-dependent opening- and shear-mode propagation behavior of fatigue cracks in ultrafine-grained Cu fabricated by equal channel angular pressing
| Autor: | Takaei Yamamoto, T. Utsunomiya, R. Takanami, J. Lee, Seung Zeon Han, Masahiro Goto, J. Kitamura, Terutoshi Yakushiji, J.H. Ahn, S.S. Kim |
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| Rok vydání: | 2021 |
| Předmět: |
Pressing
Materials science Mechanical Engineering Round bar chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Circumference Copper Industrial and Manufacturing Engineering 020303 mechanical engineering & transports Amplitude 0203 mechanical engineering chemistry Shear (geology) Mechanics of Materials Modeling and Simulation Shear mode General Materials Science Composite material 0210 nano-technology |
| Zdroj: | International Journal of Fatigue. 142:105978 |
| ISSN: | 0142-1123 |
| DOI: | 10.1016/j.ijfatigue.2020.105978 |
| Popis: | Constant and two-step stress amplitude tests were conducted to study the surface crack growth mechanism of ultrafine-grained copper processed by equal channel angular pressing (ECAP) in high- and low-cycle fatigue regimes. The crack growth direction varied depending on the location on the circumference of the round bar specimen and applied stress amplitude. On the surface where an intersection between the shear plane of final pressing and the specimen’s surface made an angle of 45° with respect to the loading axis, the crack grew with a 45° inclination to the loading axis at stress amplitudes ≥ 180 MPa. At stress amplitudes |
| Databáze: | OpenAIRE |
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