TY - GEN

T1 - Measurement of the residual stresses dynamics in tungsten during heating

AU - Balash, Ilya

AU - Arakcheev, Aleksey

AU - Sharafutdinov, Marat

AU - Shmakov, Alexander

AU - Tolochko, Boris

AU - Vasilyev, Alexander

N1 - Funding Information: The measurement of the residual stresses dynamics in tungsten during heating is supported by the Russian Science Foundation (project 19-19-00272). The work was done at the shared research center SSTRC on the basis of the VEPP-4 - VEPP-2000 complex at BINP SB RAS, using equipment supported by project RFMEFI62119X0022. Publisher Copyright: © 2020 American Institute of Physics Inc. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/11/17

Y1 - 2020/11/17

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85096472675&partnerID=8YFLogxK

U2 - 10.1063/5.0030563

DO - 10.1063/5.0030563

M3 - Conference contribution

AN - SCOPUS:85096472675

T3 - AIP Conference Proceedings

BT - Synchrotron and Free Electron Laser Radiation

A2 - Knyazev, Boris

A2 - Vinokurov, Nikolay

PB - American Institute of Physics Inc.

T2 - 2020 Internetional Conference on Synchrotron and Free Electron Laser Radiation: Generation and Application, SFR 2020

Y2 - 13 July 2020 through 16 July 2020

ER -