Structural State of a Weld Formed in Aluminum Alloy by Friction Stir Welding and Treated by Ultrasound

Abstract

The experimental data on structural state of an aluminum alloy, AlMg6, in the weld zone formed by friction stir welding are analyzed in order to evaluate the effect of its subsequent ultrasonic treatment. It is found that the crystal lattice transits into a low-stability state as a result of combined heat-induced and severe shear deformation. This transition is accompanied by considerable structural-phase changes that are manifested as an increased lattice parameter of the solid solution. This increase is caused by both high values of internal stresses and increased concentration of Mg atoms in the solid solution due to essential dissolution of the β-Al₂Mg₃ particles with the content of manganese higher than that in the matrix. This is accompanied by high-intensity diffusion and relaxation processes due to the low-stability state of crystal lattice (inhomogeneous stresses) in the weld zone.

Original language	English
Pages (from-to)	1-7
Number of pages	7
Journal	Russian Physics Journal
Volume	59
Issue number	7
DOIs	https://doi.org/10.1007/s11182-016-0862-0
Publication status	Published - 1 Nov 2016

Keywords

aluminum alloy
first- and second-order stresses
friction stir welding
structural state

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1007/s11182-016-0862-0

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Klimenov, V. A., Abzaev, Y. A., Potekaev, A. I., Vlasov, V. A., Klopotov, A. A., Zaitsev, K. V., Chumaevskii, A. V., Porobova, S. A., Grinkevich, L. S., Tazin, D. I., & Tazin, D. I. (2016). Structural State of a Weld Formed in Aluminum Alloy by Friction Stir Welding and Treated by Ultrasound. Russian Physics Journal, 59(7), 1-7. https://doi.org/10.1007/s11182-016-0862-0

Structural State of a Weld Formed in Aluminum Alloy by Friction Stir Welding and Treated by Ultrasound. / Klimenov, V. A.; Abzaev, Y. A.; Potekaev, A. I.; Vlasov, V. A.; Klopotov, A. A.; Zaitsev, K. V.; Chumaevskii, A. V.; Porobova, S. A.; Grinkevich, L. S.; Tazin, D. I.; Tazin, D. I.

In: Russian Physics Journal, Vol. 59, No. 7, 01.11.2016, p. 1-7.

Research output: Contribution to journal › Article › peer-review

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title = "Structural State of a Weld Formed in Aluminum Alloy by Friction Stir Welding and Treated by Ultrasound",

abstract = "The experimental data on structural state of an aluminum alloy, AlMg6, in the weld zone formed by friction stir welding are analyzed in order to evaluate the effect of its subsequent ultrasonic treatment. It is found that the crystal lattice transits into a low-stability state as a result of combined heat-induced and severe shear deformation. This transition is accompanied by considerable structural-phase changes that are manifested as an increased lattice parameter of the solid solution. This increase is caused by both high values of internal stresses and increased concentration of Mg atoms in the solid solution due to essential dissolution of the β-Al2Mg3 particles with the content of manganese higher than that in the matrix. This is accompanied by high-intensity diffusion and relaxation processes due to the low-stability state of crystal lattice (inhomogeneous stresses) in the weld zone.",

keywords = "aluminum alloy, first- and second-order stresses, friction stir welding, structural state",

author = "Klimenov, {V. A.} and Abzaev, {Y. A.} and Potekaev, {A. I.} and Vlasov, {V. A.} and Klopotov, {A. A.} and Zaitsev, {K. V.} and Chumaevskii, {A. V.} and Porobova, {S. A.} and Grinkevich, {L. S.} and Tazin, {D. I.} and Tazin, {D. I.}",

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AU - Klimenov, V. A.

AU - Abzaev, Y. A.

AU - Potekaev, A. I.

AU - Vlasov, V. A.

AU - Klopotov, A. A.

AU - Zaitsev, K. V.

AU - Chumaevskii, A. V.

AU - Porobova, S. A.

AU - Grinkevich, L. S.

AU - Tazin, D. I.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - The experimental data on structural state of an aluminum alloy, AlMg6, in the weld zone formed by friction stir welding are analyzed in order to evaluate the effect of its subsequent ultrasonic treatment. It is found that the crystal lattice transits into a low-stability state as a result of combined heat-induced and severe shear deformation. This transition is accompanied by considerable structural-phase changes that are manifested as an increased lattice parameter of the solid solution. This increase is caused by both high values of internal stresses and increased concentration of Mg atoms in the solid solution due to essential dissolution of the β-Al2Mg3 particles with the content of manganese higher than that in the matrix. This is accompanied by high-intensity diffusion and relaxation processes due to the low-stability state of crystal lattice (inhomogeneous stresses) in the weld zone.

AB - The experimental data on structural state of an aluminum alloy, AlMg6, in the weld zone formed by friction stir welding are analyzed in order to evaluate the effect of its subsequent ultrasonic treatment. It is found that the crystal lattice transits into a low-stability state as a result of combined heat-induced and severe shear deformation. This transition is accompanied by considerable structural-phase changes that are manifested as an increased lattice parameter of the solid solution. This increase is caused by both high values of internal stresses and increased concentration of Mg atoms in the solid solution due to essential dissolution of the β-Al2Mg3 particles with the content of manganese higher than that in the matrix. This is accompanied by high-intensity diffusion and relaxation processes due to the low-stability state of crystal lattice (inhomogeneous stresses) in the weld zone.

KW - aluminum alloy

KW - first- and second-order stresses

KW - friction stir welding

KW - structural state

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