Nucleation and growth of damage in polycrystalline aluminum under dynamic tensile loading.
- Resource Type
- Article
- Authors
- Qi, M. L.; Yao, Y.; Bie, B. X.; Ran, X. X.; Ye, W.; Fan, D.; Li, P.
- Source
- AIP Advances. 2015, Vol. 5 Issue 3, p1-7. 7p.
- Subject
- *NUCLEATION
*POLYCRYSTALS
*ELECTRON backscattering
*ELECTRON scattering
*SYNCHROTRONS
- Language
- ISSN
- 2158-3226
Plate-impact experiments were conducted to study the features and mechanisms of void nucleation and growth in the polycrystalline of pure aluminum under dynamic loading. Soft-recovered samples have been analyzed by metallographic microscopy, electron back scattering diffraction (EBSD), and synchrotron radiation x-ray tomography technology. It was found that most of the void nucleation in grains neared the boundaries of "weak-orientation" grains and grew toward the grain boundaries with fractured small grains around the boundaries. This was mainly caused by the accumulation and interaction of slip systems in the "weak-orientation" grains. In addition, the micro voids were nearly octahedron because the octahedral slip systems were formed by 8 slip planes in the polycrystalline of pure aluminum. The EBSD results are consistent with the three-dimensional structure observed by synchrotron radiation x-ray. [ABSTRACT FROM AUTHOR]