Dec 1, 2019
Microstructural deformation process of shock-compressed polycrystalline aluminum
Scientific Reports
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- Volume
- 9
- Number
- 1
- First page
- 7604
- Last page
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1038/s41598-019-43876-2
© 2019, The Author(s). Plastic deformation of polycrystalline materials under shock wave loading is a critical characteristic in material science and engineering. However, owing to the nanosecond time scale of the shock-induced deformation process, we currently have a poor mechanistic understanding of the structural changes from atomic scale to mesoscale. Here, we observed the dynamic grain refinement of polycrystalline aluminum foil under laser-driven shock wave loading using time-resolved X-ray diffraction. Diffraction spots on the Debye-Scherrer ring from micrometer-sized aluminum grains appeared and disappeared irregularly, and were shifted and broadened as a result of laser-induced shock wave loading. Behind the front of shock wave, large grains in aluminum foil were deformed, and subsequently exhibited grain rotation and a reduction in size. The width distribution of the diffraction spots broadened because of shock-induced grain refinement and microstrain in each grain. We performed quantitative analysis of the inhomogeneous lattice strain and grain size in the shocked polycrysalline aluminum using the Williamson-Hall method and determined the dislocation density under shock wave loading.
- Link information
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- DOI
- https://doi.org/10.1038/s41598-019-43876-2
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/31110218
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85065992467&origin=inward Open access
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85065992467&origin=inward
- ID information
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- DOI : 10.1038/s41598-019-43876-2
- eISSN : 2045-2322
- Pubmed ID : 31110218
- SCOPUS ID : 85065992467