Femtosecond quantification of void evolution during rapid material failure
File(s)
Published version
Author(s)
Type
Journal Article
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.
Date Issued
2020-12-16
Date Acceptance
2020-11-02
Citation
Science Advances, 2020, 6 (51), pp.1-10
ISSN
2375-2548
Publisher
American Association for the Advancement of Science
Start Page
1
End Page
10
Journal / Book Title
Science Advances
Volume
6
Issue
51
Copyright Statement
Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY).
License URL
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Rolls-Royce Plc
Engineering & Physical Science Research Council (E
Identifier
https://advances.sciencemag.org/content/6/51/eabb4434
Grant Number
EP/L001748/1
EP/K034332/1
5002680312
138874
Subjects
Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
X-RAY-SCATTERING
DYNAMIC FRACTURE
SPALL STRENGTH
DIFFRACTION
DUCTILE
NEUTRON
METALS
CARBON
RATES
STATE
Publication Status
Published
Article Number
eabb4434
Date Publish Online
2020-12-16