Femtosecond Visualization of hcp-Iron Strength and Plasticity under Shock Compression
| Autor: | Merkel, Sébastien, Hok, Sovanndara, Bolme, Cynthia, Rittman, Dylan, Ramos, Kyle James, Morrow, Benjamin, Lee, Hae Ja, Nagler, Bob, Galtier, Eric, Granados, Eduardo, Hashim, Akel, Mao, Wendy L, Gleason, Arianna E |
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| Přispěvatelé: | Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL), Stanford EARTH, Stanford University, Los Alamos National Laboratory (LANL), Stanford Synchrotron Radiation Lightsource (SSRL SLAC), SLAC National Accelerator Laboratory (SLAC), Stanford University-Stanford University, I-SITE ULNE R-ERCGEN-19-006-MERKEL MetalCore, ANR-16-IDEX-0004,ULNE,ULNE(2016), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [CHIM.MATE]Chemical Sciences/Material chemistry [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
| Zdroj: | Physical Review Letters Physical Review Letters, American Physical Society, 2021, Physical Review Letters, 127 (20), pp.205501. ⟨10.1103/physrevlett.127.205501⟩ Physical Review Letters, 2021, Physical Review Letters, 127 (20), pp.205501. ⟨10.1103/physrevlett.127.205501⟩ |
| ISSN: | 0031-9007 1079-7114 |
| DOI: | 10.1103/physrevlett.127.205501⟩ |
| Popis: | International audience; Iron is a key constituent of planets and an important technological material. Here, we combine in situ ultrafast x-ray diffraction with laser-induced shock compression experiments on Fe up to 187(10) GPa and 4070(285) K at 10^8 s−1 in strain rate to study the plasticity of hexagonal-close-packed (hcp)-Fe under extreme loading states. {10-12} deformation twinning controls the polycrystalline Fe microstructures and occurs within 1 ns, highlighting the fundamental role of twinning in hcp polycrystals deformation at high strain rates. The measured deviatoric stress initially increases to a significant elastic overshoot before the onset of flow, attributed to a slower defect nucleation and mobility. The initial yield strength of materials deformed at high strain rates is thus several times larger than their longer-term flow strength. These observations illustrate how time-resolved ultrafast studies can reveal distinctive plastic behavior in materials under extreme environments. |
| Databáze: | OpenAIRE |
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