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Title: Sound velocity, shear modulus, and shock melting of beryllium along the Hugoniot

Journal Article · · Physical Review B

Magnetically launched flyer plates were used to explore the shock response of beryllium between 90 and 300 GPa. Solid aluminum flyer plates drove steady shocks into polycrystalline beryllium to constrain the Hugoniot from 90 to 190 GPa. Multilayered copper/aluminum flyer plates generated a shock followed by an overtaking rarefaction which was used to determine the sound velocity in both solid and liquid beryllium between 130 and 300 GPa. Disappearance of the longitudinal wave was used to identify the onset of melt along the Hugoniot and measurements were compared to density functional theory calculations to explore the proposed hcp-bcc transition at high pressure. The onset of melt along the Hugoniot was identified at ~205 GPa , which is in good agreement with theoretical predictions. These results reflect no clear indication of an hcp-bcc transition prior to melt along the beryllium Hugoniot. Comparatively, the shear stress, determined from the release wave profiles, was found to gradually decrease with stress and eventually vanish at the onset of melt.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000; NA0003525
OSTI ID:
1559520
Alternate ID(s):
OSTI ID: 1558167
Report Number(s):
SAND-2019-9735J; PRBMDO; 678630; TRN: US2000358
Journal Information:
Physical Review B, Vol. 100, Issue 5; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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