Research output: Contribution to journal › Article › peer-review
In situ method for studying stresses in a pulse-heated tungsten plate based on measurements of surface curvature. / Cherepanov, D. E.; Arakcheev, A. S.; Burdakov, A. V. et al.
In: Nuclear Materials and Energy, Vol. 26, 100919, 03.2021.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - In situ method for studying stresses in a pulse-heated tungsten plate based on measurements of surface curvature
AU - Cherepanov, D. E.
AU - Arakcheev, A. S.
AU - Burdakov, A. V.
AU - Kandaurov, I. V.
AU - Kasatov, A. A.
AU - Popov, V. A.
AU - Ruktuev, A. A.
AU - Vasilyev, A. A.
AU - Vyacheslavov, L. N.
N1 - Funding Information: Measurements of the bending of a sample were financially supported by Russian Science Foundation (project 19-19-00272 ). Publisher Copyright: © 2021 The Authors Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/3
Y1 - 2021/3
N2 - Damage of divertor tungsten tiles as a result of transient plasma processes is one of the key problems of the ITER tokamak. Even if the temperature of the divertor tiles is maintained below the melting threshold, their thermal deformation, accumulation of residual stresses and cracking will occur. Cracking reduces the resistance of the metal to subsequent loads, therefore, the study of this process is important. In materials science, non-destructive methods for measuring mechanical stresses are very limited. In this work, a new method is proposed that allows non-contact investigation of stresses in polycrystalline tungsten plates by their bending. A corresponding diagnostic system and theoretical model are implemented. A number of experiments were carried out using this diagnostic system at the BETA facility at the Budker Institute to study the dynamics of tungsten plates bending with different thickness, subjected to pulsed heating of different intensities. The experimental results showed the qualitatively expected process of the plate bending, as well as good agreement with the theoretical model. This proved that the method described in the work is promising for use in order to study the residual stresses in a pulse-heated metal sample.
AB - Damage of divertor tungsten tiles as a result of transient plasma processes is one of the key problems of the ITER tokamak. Even if the temperature of the divertor tiles is maintained below the melting threshold, their thermal deformation, accumulation of residual stresses and cracking will occur. Cracking reduces the resistance of the metal to subsequent loads, therefore, the study of this process is important. In materials science, non-destructive methods for measuring mechanical stresses are very limited. In this work, a new method is proposed that allows non-contact investigation of stresses in polycrystalline tungsten plates by their bending. A corresponding diagnostic system and theoretical model are implemented. A number of experiments were carried out using this diagnostic system at the BETA facility at the Budker Institute to study the dynamics of tungsten plates bending with different thickness, subjected to pulsed heating of different intensities. The experimental results showed the qualitatively expected process of the plate bending, as well as good agreement with the theoretical model. This proved that the method described in the work is promising for use in order to study the residual stresses in a pulse-heated metal sample.
KW - In situ diagnostics
KW - Residual stress
KW - Transient heat load
KW - Tungsten
UR - http://www.scopus.com/inward/record.url?scp=85100060996&partnerID=8YFLogxK
U2 - 10.1016/j.nme.2021.100919
DO - 10.1016/j.nme.2021.100919
M3 - Article
AN - SCOPUS:85100060996
VL - 26
JO - Nuclear Materials and Energy
JF - Nuclear Materials and Energy
SN - 2352-1791
M1 - 100919
ER -
ID: 27639900