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Multimodal 3D characterization of voids in shock-loaded tantalum: Implications for ductile spallation mechanisms
Multimodal 3D characterization of voids in shock-loaded tantalum: Implications for ductile spallation mechanisms
- Source :
- Acta Materialia. 215:117057
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Predicting the failure of crystalline materials at high strain rates requires knowledge of the underlying failure mechanisms and their dependence on microstructure. In this study, a 3D-EBSD characterization experiment is performed on high-purity tantalum prior to and after partial spallation by plate impact, which allows for the statistical assessment of the microstructural neighborhoods surrounding incipient voids. In analyzing the resulting dataset containing 5884 grains and 467 voids, it is observed that the voids were roughly spherical and consistent in size throughout the spalled material. The voids are most likely to reside at quadruple points, at triple junctions, at grain boundaries, and within grains, in decreasing order of prevalence. Moreover, voids tend to form at grain boundaries with high degrees of plastic incompatibility, growing into the plastically soft grain but orienting primarily with or perpendicular to the loading direction. The statistics from these analyses of 3D microstructural data support dynamic cavitation models for ductile spallation.
- Subjects :
- 010302 applied physics
Materials science
Polymers and Plastics
Metals and Alloys
Tantalum
chemistry.chemical_element
02 engineering and technology
021001 nanoscience & nanotechnology
Microstructure
01 natural sciences
Electronic, Optical and Magnetic Materials
Characterization (materials science)
Shock (mechanics)
chemistry
Cavitation
0103 physical sciences
Ceramics and Composites
Perpendicular
Spallation
Grain boundary
Composite material
0210 nano-technology
Subjects
Details
- ISSN :
- 13596454
- Volume :
- 215
- Database :
- OpenAIRE
- Journal :
- Acta Materialia
- Accession number :
- edsair.doi...........5e8e013b53d0d85b2300cd1435019c36
- Full Text :
- https://doi.org/10.1016/j.actamat.2021.117057