Dynamic response of high temperature uranium phases

E. Zaretsky, B. Herrmann, D. Shvarts

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

10 Scopus citations

Abstract

Unalloyed uranium and uranium-0.78 wt%Ti alloy were studied in planar impact experiments with initial sample temperature ranging from 27 to 860°C. The velocity of the free surface of the samples was monitored by VISAR. It was found that the dynamic compressive strength of both the materials undergoes two-fold increase in the narrow temperature interval corresponding to the domain of beta-phase of uranium. The increase is followed by abrupt, factor of 3-4, strength drop when the initial state of the tested material is gamma-uranium. Such strength behavior explains the uranium susceptibility to adiabatic shear banding. The spall strength of both the alloys is characterized by similar temperature variations. The strength mechanism (phonon viscosity) acting in gamma-phase of pure uranium seems inherited from its alpha-structure while the strength of beta-uranium is controlled by high resistance to shearing characteristic for material having the structure of intermetallic sigma-phase.

Original languageEnglish
Title of host publicationSHOCK COMPRESSION OF CONDENSED MATTER - 2005
Subtitle of host publicationProceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
Pages292-295
Number of pages4
DOIs
StatePublished - 1 Dec 2006
EventSHOCK COMPRESSION OF CONDENSED MATTER - 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter - Baltimore, MD, United States
Duration: 31 Jul 20055 Aug 2005

Publication series

NameAIP Conference Proceedings
Volume845 I
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceSHOCK COMPRESSION OF CONDENSED MATTER - 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
Country/TerritoryUnited States
CityBaltimore, MD
Period31/07/055/08/05

Keywords

  • Phase transitions
  • Strength
  • Temperature
  • U
  • U-0.75%Ti

ASJC Scopus subject areas

  • General Physics and Astronomy

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