Abstract
Due to its hexagonal close-packed structure only a limited number of crystallographic deformation mechanisms including basal, prismatic and pyramidal slip as well as deformation twinning are activated during mechanical loading of Magnesium alloys. The reported tension/compression asymmetry and plastic anisotropy manifest themselves in a peculiar mesoscopic fatigue behavior characterized by an unusual hysteresis shape which evolves with fatigue. By combining multiscale mechanical testing, in situ observations of full field deformations and acoustic emission as well as post mortem microstructure characterization the role of twinning in the microplasticity of this type of alloys is investigated and is found to be the dominant factor for fatigue damage incubation. Such measurements are further used in related multiscale computational modeling to formulate mechanistic contributions of twinning in the context of plasticity and fatigue.
| Original language | English (US) |
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| Pages | 540-541 |
| Number of pages | 2 |
| State | Published - 2017 |
| Externally published | Yes |
| Event | 14th International Conference on Fracture, ICF 2017 - Rhodes, Greece Duration: Jun 18 2017 → Jun 20 2017 |
Conference
| Conference | 14th International Conference on Fracture, ICF 2017 |
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| Country/Territory | Greece |
| City | Rhodes |
| Period | 6/18/17 → 6/20/17 |
All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Building and Construction