Measurement of the residual stresses dynamics in tungsten during heating

Ilya Balash, Aleksey Arakcheev, Marat Sharafutdinov, Alexander Shmakov, Boris Tolochko, Alexander Vasilyev

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

Abstract

In a thermonuclear reactor plasma interacts with the divertor walls in the form of periodic heat pulses as well as constant heat load. As a result, residual plastic deformations and mechanical stresses can occur, which cause destruction of the divertor material. However, these residual deformations and stresses can be relieved under the influence of constant flux of plasma and the consequential high temperature of the material. The goal of this work was the study of residual stresses dynamics in a heated material. Residual deformations and stresses were measured using X-ray diffractometry. The measurements were conducted on tungsten samples that were irradiated with an electron beam on the BETA facility with the purpose of simulating plasma heat loads. Synchrotron radiation scattering station “Anomalous scattering” on the beam line 2 of VEPP-3 was used to measure diffractograms from which scattering angle - sample tilt angle dependencies were obtained. The experimental data was used for calculation of deformation and stress tensor components. To compare heat load and residual stress profiles the measurements were conducted with spatial resolution. Synchrotron radiation scattering station “Diffraction movie” was used for measuring the dynamics of residual stresses during heating. As a result of these experiments scattering angle - temperature dependencies were obtained. Residual stresses relaxation was measured, the result has met our expectations.

Original languageEnglish
Title of host publicationSynchrotron and Free Electron Laser Radiation
Subtitle of host publicationGeneration and Application, SFR 2020
EditorsBoris Knyazev, Nikolay Vinokurov
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735440333
DOIs
Publication statusPublished - 17 Nov 2020
Event2020 Internetional Conference on Synchrotron and Free Electron Laser Radiation: Generation and Application, SFR 2020 - Novosibirsk, Russian Federation
Duration: 13 Jul 202016 Jul 2020

Publication series

NameAIP Conference Proceedings
Volume2299
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference2020 Internetional Conference on Synchrotron and Free Electron Laser Radiation: Generation and Application, SFR 2020
CountryRussian Federation
CityNovosibirsk
Period13.07.202016.07.2020

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