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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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 Creators:
Yang, Hong1, Author
Armstrong, Michael R.1, Author
Austin, Ryan A.1, Author
Radousky, Harry B.1, Author
Patel, Akshat Hetal1, Author
Wei, Tiwei1, Author
Goncharov, Alexander F.1, Author
Mao, Wendy L.1, Author
Cranados, Eduardo1, Author
Lee, Hae Ja1, Author
Nam, Inhyuk1, Author
Nagler, Bob1, Author
Walter, Peter1, Author
Belof, Jonathan L.1, Author
Brown, Shaughnessy B.1, Author
Prakapenka, Vitali1, Author
Lobanov, Sergey2, Author              
Prescher, Clemens1, Author
Holtgrewe, Nicolas1, Author
Stavrou, Elissaios1, Author
Grivickas, Paulius V.1, AuthorGleason, Arianna E.1, Author more..
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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 Abstract: 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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Language(s): eng - English
 Dates: 20242024
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: GFZPOF: p4 T3 Restless Earth
DOI: 10.1063/5.0217779
OATYPE: Hybrid Open Access
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Title: Journal of Applied Physics
Source Genre: Journal, SCI, Scopus
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Pages: - Volume / Issue: 136 Sequence Number: 055901 Start / End Page: - Identifier: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals243
Publisher: AIP publishing