Year-end Sale % OFF 
Abstract
Strength characteristics of zirconium - niobium alloy E635 were measured under shock - wave loading conditions at normal and elevated temperatures and results of these measurements are presented. Measurements were taken in conditions when samples were impacted by plane shock waves with the pressure up to 13 GPa and duration from ∼0.05 μs up to 1 μs. Free-surface velocity profiles were recorded with the help of VISAR and PDV laser Doppler velocimeters having nanosecond time resolution. Evolution of elastic precursors with samples thickness varying from 0.5 up to 8 mm is also considered. Measured attenuation of the elastic precursor was used to determine plastic strain rate behind the precursor front. Temperature effect on the value of dynamic elastic limit and spall strength at normal and elevated temperatures is studied. This work is implemented with the support of the State Atomic Energy Corporation “Rosatom” under State Contract H.4x.44.90.13.1111.
Highlights
Zirconium and alloys on its basis are main structural materials in nuclear power engineering
This paper presents results given by investigations into strength characteristics of zirconium alloy E635 in submicrosecond shock-waves at strain rates of 104–106 s−1 and compares its characteristics with those of zirconium alloy E110
The plane shock wave in samples having 1, 2, 4, and 8-mm thickness was generated by an impactor of zirconium alloy E635 with the thickness of 0.5, 1, 2, and 4 mm, respectively
Summary
Zirconium and alloys on its basis are main structural materials in nuclear power engineering. Use of products made from zirconium and its alloys under high temperatures and the necessity to predict behavior of these materials both in severe operational conditions and probable emergency situations highlights importance of the issue how temperature effects elasticplastic and mechanical strength characteristics of these materials under high-strain-rate deformation. Investigation into processes of elastic-viscous-plastic deformation of metals and alloys under shock-wave loading [3] allows us to measure velocity-temperature relationships how these materials resist to deformation and fracture. The structure of shock waves in solid bodies depends on processes of their elastic-viscous-plastic deformation, possible phase transformations, as well as on kinetics of fracture incipience and development [4,5,6]. The material was studied in the α – phase under normal and elevated temperatures and in the β – phase (under higher than 900 ◦C temperature)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
