Coakley, James, Higginbotham, Andrew orcid.org/0000-0001-5211-9933, McGonegle, David et al. (11 more authors) (2020) Femtosecond quantification of void evolution during rapid material failure. Science Advances. eabb4434. ISSN 2375-2548
Abstract
Understanding high-velocity impact, and the subsequent high strain rate material deformation and potential catastrophic failure, is of critical importance across a range of scientific and engineering disciplines that include astrophysics, materials science, and aerospace engineering. The deformation and failure mechanisms are not thoroughly understood, given the challenges of experimentally quantifying material evolution at extremely short time scales. Here, copper foils are rapidly strained via picosecond laser ablation and probed in situ with femtosecond x-ray free electron (XFEL) pulses. Small-angle x-ray scattering (SAXS) monitors the void distribution evolution, while wide-angle scattering (WAXS) simultaneously determines the strain evolution. The ability to quantifiably characterize the nanoscale during high strain rate failure with ultrafast SAXS, complementing WAXS, represents a broadening in the range of science that can be performed with XFEL. It is shown that ultimate failure occurs via void nucleation, growth, and coalescence, and the data agree well with molecular dynamics simulations.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2020, The Authors. |
Dates: |
|
Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Funding Information: | Funder Grant number EPSRC EP/P024777/1 |
Depositing User: | Pure (York) |
Date Deposited: | 06 Jan 2021 13:40 |
Last Modified: | 27 Nov 2024 00:39 |
Published Version: | https://doi.org/10.1126/sciadv.abb4434 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1126/sciadv.abb4434 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:169743 |