RT Journal Article
SR Electronic
T1 Dynamic fracture of tantalum under extreme tensile stress
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP e1602705
DO 10.1126/sciadv.1602705
VO 3
IS 6
A1 Albertazzi, Bruno
A1 Ozaki, Norimasa
A1 Zhakhovsky, Vasily
A1 Faenov, Anatoly
A1 Habara, Hideaki
A1 Harmand, Marion
A1 Hartley, Nicholas
A1 Ilnitsky, Denis
A1 Inogamov, Nail
A1 Inubushi, Yuichi
A1 Ishikawa, Tetsuya
A1 Katayama, Tetsuo
A1 Koyama, Takahisa
A1 Koenig, Michel
A1 Krygier, Andrew
A1 Matsuoka, Takeshi
A1 Matsuyama, Satoshi
A1 McBride, Emma
A1 Migdal, Kirill Petrovich
A1 Morard, Guillaume
A1 Ohashi, Haruhiko
A1 Okuchi, Takuo
A1 Pikuz, Tatiana
A1 Purevjav, Narangoo
A1 Sakata, Osami
A1 Sano, Yasuhisa
A1 Sato, Tomoko
A1 Sekine, Toshimori
A1 Seto, Yusuke
A1 Takahashi, Kenjiro
A1 Tanaka, Kazuo
A1 Tange, Yoshinori
A1 Togashi, Tadashi
A1 Tono, Kensuke
A1 Umeda, Yuhei
A1 Vinci, Tommaso
A1 Yabashi, Makina
A1 Yabuuchi, Toshinori
A1 Yamauchi, Kazuto
A1 Yumoto, Hirokatsu
A1 Kodama, Ryosuke
YR 2017
UL http://advances.sciencemag.org/content/3/6/e1602705.abstract
AB 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 ~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.