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  Evidence of non-isentropic release from high residual temperatures in shocked metals measured with ultrafast x-ray diffraction

Yang, H., Armstrong, M. R., Austin, R. A., Radousky, H. B., Patel, A. H., Wei, T., Goncharov, A. F., Mao, W. L., Cranados, E., Lee, H. J., Nam, I., Nagler, B., Walter, P., Belof, J. L., Brown, S. B., Prakapenka, V., Lobanov, S., Prescher, C., Holtgrewe, N., Stavrou, E., Grivickas, P. V., Gleason, A. E. (2024): Evidence of non-isentropic release from high residual temperatures in shocked metals measured with ultrafast x-ray diffraction. - Journal of Applied Physics, 136, 055901.
https://doi.org/10.1063/5.0217779

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 Urheber:
Yang, Hong1, Autor
Armstrong, Michael R.1, Autor
Austin, Ryan A.1, Autor
Radousky, Harry B.1, Autor
Patel, Akshat Hetal1, Autor
Wei, Tiwei1, Autor
Goncharov, Alexander F.1, Autor
Mao, Wendy L.1, Autor
Cranados, Eduardo1, Autor
Lee, Hae Ja1, Autor
Nam, Inhyuk1, Autor
Nagler, Bob1, Autor
Walter, Peter1, Autor
Belof, Jonathan L.1, Autor
Brown, Shaughnessy B.1, Autor
Prakapenka, Vitali1, Autor
Lobanov, Sergey2, Autor              
Prescher, Clemens1, Autor
Holtgrewe, Nicolas1, Autor
Stavrou, Elissaios1, Autor
Grivickas, Paulius V.1, AutorGleason, Arianna E.1, Autor mehr..
Affiliations:
1External Organizations, ou_persistent22              
23.6 Chemistry and Physics of Earth Materials, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146036              

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 Zusammenfassung: Shock experiments are widely used to understand the mechanical and electronic properties of matter under extreme conditions. However, after shock loading to a Hugoniot state, a clear description of the post-shock thermal state and its impacts on materials is still lacking. We used diffraction patterns from 100-fs x-ray pulses to investigate the temperature evolution of laser-shocked Al–Zr metal film composites at time delays ranging from 5 to 75 ns driven by a 120-ps short-pulse laser. We found significant heating of both Al and Zr after shock release, which can be attributed to heat generated by inelastic deformation. A conventional hydrodynamic model that employs (i) typical descriptions of Al and Zr mechanical strength and (ii) elevated strength responses (which might be attributed to an unknown strain rate dependence) did not fully account for the measured temperature increase, which suggests that other strength-related mechanisms (such as fine-scale void growth) could play an important role in thermal responses under shock wave loading/unloading cycles. Our results suggest that a significant portion of the total shock energy delivered by lasers becomes heat due to defect-facilitated plastic work, leaving less converted to kinetic energy. This heating effect may be common in laser-shocked experiments but has not been well acknowledged. High post-shock temperatures may induce phase transformation of materials during shock release. Another implication for the study is the preservability of magnetic records from planetary surfaces that have a shock history from frequent impact events.

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Sprache(n): eng - Englisch
 Datum: 20242024
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: GFZPOF: p4 T3 Restless Earth
DOI: 10.1063/5.0217779
OATYPE: Hybrid Open Access
 Art des Abschluß: -

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Titel: Journal of Applied Physics
Genre der Quelle: Zeitschrift, SCI, Scopus
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Seiten: - Band / Heft: 136 Artikelnummer: 055901 Start- / Endseite: - Identifikator: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals243
Publisher: AIP publishing