A numerical study of the microscale plastic strain localization in friction stir weld zones

doi:10.22190/FUME180102012B

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Balokhonov, Ruslan R. | Romanova, Varvara A. | Batukhtina, Ekaterina E.

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DOI Доступ к ресурсу на сайте издателя				10.22190/FUME180102012B

Title: A numerical study of the microscale plastic strain localization in friction stir weld zones
Creator: Romanova, Varvara A.
Creator: Batukhtina, Ekaterina E.
Creator: Sergeev, Maxim V.
Creator: Emelianova, Evgeniya S.
Creator: Balokhonov, Ruslan R.
Subject: пластическая деформация
сварка трением с перемешиванием
границы зерен
Date: 2018
DOI: 10.22190/FUME180102012B
Description: A crystal plasticity approach was used to study the effects of grain shape and texture on the deformation behavior of friction stir weld (FSW) microregions. The explicit stress-strain analysis was performed for two representative grain structures with equiaxed and extended grains. Grain orientations were assigned to simulate no texture or a weak or strong cubic texture. Calculations have shown that the texture gave rise to earlier plastic strain localization on a larger scale. The highest stresses were found to develop in a non-textured specimen with equiaxed grains where the grain boundaries served as a barrier to dislocation motion. In both equiaxed and extended grain structures with a strong cubic texture no pronounced strain localization was seen on the grain scale but mesoscale shear bands appeared early in the deformation process. The calculations have shown that the microstructure-based simulation is a reasonable tool to study the deformation behavior of FSW materials, which is difficult to be predicted within macroscopic models alone.

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collection(s): Физико-технический факультет
Identifier: vtls:000650665
http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000650665
Type: статьи в журналах
Source: Facta universitatis. Series : Mechanical engineering. 2018. Vol. 16, № 1. P. 77-86
Language: eng

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Физико-технический факультет A numerical study of the microscale plastic strain localization in friction stir weld zones