Dynamic fracture of tantalum under extreme tensile stress
- Osaka Univ. (Japan); Pierre and Marie Curie Univ., Paris (France)
- Osaka Univ. (Japan)
- Dukhov Research Inst. of Automatics, Moscow (Russia); Russian Academy of Sciences (RAS), Moscow (Russian Federation)
- Sorbonne Univ., Paris (France)
- Osaka Univ. (Japan); Helmholtz-Zentrum Dresden-Rossendorf, (Germany)
- Japan Synchreotron Radiation Research Inst., Sayo (Japan); RIKEN Center, Sayo (Japan)
- RIKEN Center, Sayo (Japan)
- Japan Synchrotron Radiation Research Inst., Sayo (Japan); RIKEN Center, Sayo (Japan)
- Japan Synchrotron Radiation Research Inst., Sayo (Japan)
- Pierre and Marie Curie Univ., Paris (France); Osaka Univ. (Japan)
- SLAC National Accelerator Lab., Menlo Park, CA (United States); European X-ray Free-Electron Laser (XFEL), Schenefeld (Germany)
- Dukhov Research Inst. of Automatics, Moscow (Russia)
- Okayama Univ., Misasa (Japan)
- National Inst. for Materials Science (NIMS), Sayo (Japan). Synchrotron X-ray Station at Spring-8
- Hiroshima Univ. (Japan)
- Hiroshima Univ. (Japan); Center for High Pressure Science and Technology Advanced Research, Shanghai (China)
- Kobe Univ. (Japan)
- Ehime Univ., Matsuyama (Japan); Japan Synchrotron Radiation Research Inst., Sayo (Japan)
- Pierre and Marie Curie Univ., Paris (France)
- RIKEN Center, Sayo (Japan); Osaka Univ. (Japan)
The understanding of fracture phenomena of a material at extremely high strain rates is a key issue for a wide variety of scientific research ranging from applied science and technological developments to fundamental science such as laser-matter interaction and geology. Despite its interest, its study relies on a fine multiscale description, in between the atomic scale and macroscopic processes, so far only achievable by large-scale atomic simulations. Direct ultrafast real-time monitoring of dynamic fracture (spallation) at the atomic lattice scale with picosecond time resolution was beyond the reach of experimental techniques. We show that the coupling between a high-power optical laser pump pulse and a femtosecond x-ray probe pulse generated by an x-ray free electron laser allows detection of the lattice dynamics in a tantalum foil at an ultrahigh strain rate of Embedded Image ~2 × 108 to 3.5 × 108 s-1. A maximal density drop of 8 to 10%, associated with the onset of spallation at a spall strength of ~17 GPa, was directly measured using x-ray diffraction. The experimental results of density evolution agree well with large-scale atomistic simulations of shock wave propagation and fracture of the sample. Our experimental technique opens a new pathway to the investigation of ultrahigh strain-rate phenomena in materials at the atomic scale, including high-speed crack dynamics and stress-induced solid-solid phase transitions.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-76SF00515; ID0EPMFM18226; 16-08-01181
- OSTI ID:
- 1390704
- Journal Information:
- Science Advances, Vol. 3, Issue 6; ISSN 2375-2548
- Publisher:
- AAASCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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