Microtwins and their effect on accumulation of excess dislocation density in grains with different types of crystal lattice bending in deformed austenitic steel

Ivan Gibert, Svetlana Kiseleva, Natalya Popova, Nina Koneva, Eduard Kozlov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The investigation of excess dislocation density accumulation in the deformed polycrystalline austenitic steel was carried out using transmission electron microscopy (TEM). The distributions of the excess dislocation density in the grains of the deformed austenitic steel with different bending types were obtained and plotted. It was established that in the austenitic polycrystalline steel at the deformation degrees ε = 14 and 25 % the distributions of the excess dislocation density are multimodal. In both cases the grain with compound bending is more stressed. The values of the average excess dislocation density in the grains with the compound and simple bending are less at ε = 25 % than that at ε = 14 %. This is explained by a significant relaxation of the internal stresses in steel with the increase of the deformation degree from 14 % to 25 %. The increase of the number of twinning systems and the material volume fraction covered by twinning leads to the internal stress relaxation and consequently to the increase of the excess dislocation density. The presence of microtwins in the deformed material has an influence on the distribution of the excess dislocation density. In the deformed polycrystalline austenitic steel the number of grains with compound bending is increased with the increase of the plastic deformation degree.

Original languageEnglish
Title of host publicationAdvanced Materials in Technology and Construction, AMTC 2015
Subtitle of host publicationProceedings of the II All-Russian Scientific Conference of Young Scientists "Advanced Materials in Technology and Construction"
PublisherAmerican Institute of Physics Inc.
Volume1698
ISBN (Electronic)9780735413450
DOIs
Publication statusPublished - 15 Jan 2016
Event2nd All-Russian Scientific Conference of Young Scientists on Advanced Materials in Technology and Construction, AMTC 2015 - Tomsk, Russian Federation
Duration: 6 Oct 20159 Oct 2015

Conference

Conference2nd All-Russian Scientific Conference of Young Scientists on Advanced Materials in Technology and Construction, AMTC 2015
CountryRussian Federation
CityTomsk
Period6.10.159.10.15

Fingerprint

crystal lattices
steels
twinning
residual stress
stress relaxation
plastic deformation
transmission electron microscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Gibert, I., Kiseleva, S., Popova, N., Koneva, N., & Kozlov, E. (2016). Microtwins and their effect on accumulation of excess dislocation density in grains with different types of crystal lattice bending in deformed austenitic steel. In Advanced Materials in Technology and Construction, AMTC 2015: Proceedings of the II All-Russian Scientific Conference of Young Scientists "Advanced Materials in Technology and Construction" (Vol. 1698). [020004] American Institute of Physics Inc.. https://doi.org/10.1063/1.4937817

Microtwins and their effect on accumulation of excess dislocation density in grains with different types of crystal lattice bending in deformed austenitic steel. / Gibert, Ivan; Kiseleva, Svetlana; Popova, Natalya; Koneva, Nina; Kozlov, Eduard.

Advanced Materials in Technology and Construction, AMTC 2015: Proceedings of the II All-Russian Scientific Conference of Young Scientists "Advanced Materials in Technology and Construction". Vol. 1698 American Institute of Physics Inc., 2016. 020004.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Gibert, I, Kiseleva, S, Popova, N, Koneva, N & Kozlov, E 2016, Microtwins and their effect on accumulation of excess dislocation density in grains with different types of crystal lattice bending in deformed austenitic steel. in Advanced Materials in Technology and Construction, AMTC 2015: Proceedings of the II All-Russian Scientific Conference of Young Scientists "Advanced Materials in Technology and Construction". vol. 1698, 020004, American Institute of Physics Inc., 2nd All-Russian Scientific Conference of Young Scientists on Advanced Materials in Technology and Construction, AMTC 2015, Tomsk, Russian Federation, 6.10.15. https://doi.org/10.1063/1.4937817
Gibert I, Kiseleva S, Popova N, Koneva N, Kozlov E. Microtwins and their effect on accumulation of excess dislocation density in grains with different types of crystal lattice bending in deformed austenitic steel. In Advanced Materials in Technology and Construction, AMTC 2015: Proceedings of the II All-Russian Scientific Conference of Young Scientists "Advanced Materials in Technology and Construction". Vol. 1698. American Institute of Physics Inc. 2016. 020004 https://doi.org/10.1063/1.4937817
Gibert, Ivan ; Kiseleva, Svetlana ; Popova, Natalya ; Koneva, Nina ; Kozlov, Eduard. / Microtwins and their effect on accumulation of excess dislocation density in grains with different types of crystal lattice bending in deformed austenitic steel. Advanced Materials in Technology and Construction, AMTC 2015: Proceedings of the II All-Russian Scientific Conference of Young Scientists "Advanced Materials in Technology and Construction". Vol. 1698 American Institute of Physics Inc., 2016.
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abstract = "The investigation of excess dislocation density accumulation in the deformed polycrystalline austenitic steel was carried out using transmission electron microscopy (TEM). The distributions of the excess dislocation density in the grains of the deformed austenitic steel with different bending types were obtained and plotted. It was established that in the austenitic polycrystalline steel at the deformation degrees ε = 14 and 25 {\%} the distributions of the excess dislocation density are multimodal. In both cases the grain with compound bending is more stressed. The values of the average excess dislocation density in the grains with the compound and simple bending are less at ε = 25 {\%} than that at ε = 14 {\%}. This is explained by a significant relaxation of the internal stresses in steel with the increase of the deformation degree from 14 {\%} to 25 {\%}. The increase of the number of twinning systems and the material volume fraction covered by twinning leads to the internal stress relaxation and consequently to the increase of the excess dislocation density. The presence of microtwins in the deformed material has an influence on the distribution of the excess dislocation density. In the deformed polycrystalline austenitic steel the number of grains with compound bending is increased with the increase of the plastic deformation degree.",
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AU - Kozlov, Eduard

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N2 - The investigation of excess dislocation density accumulation in the deformed polycrystalline austenitic steel was carried out using transmission electron microscopy (TEM). The distributions of the excess dislocation density in the grains of the deformed austenitic steel with different bending types were obtained and plotted. It was established that in the austenitic polycrystalline steel at the deformation degrees ε = 14 and 25 % the distributions of the excess dislocation density are multimodal. In both cases the grain with compound bending is more stressed. The values of the average excess dislocation density in the grains with the compound and simple bending are less at ε = 25 % than that at ε = 14 %. This is explained by a significant relaxation of the internal stresses in steel with the increase of the deformation degree from 14 % to 25 %. The increase of the number of twinning systems and the material volume fraction covered by twinning leads to the internal stress relaxation and consequently to the increase of the excess dislocation density. The presence of microtwins in the deformed material has an influence on the distribution of the excess dislocation density. In the deformed polycrystalline austenitic steel the number of grains with compound bending is increased with the increase of the plastic deformation degree.

AB - The investigation of excess dislocation density accumulation in the deformed polycrystalline austenitic steel was carried out using transmission electron microscopy (TEM). The distributions of the excess dislocation density in the grains of the deformed austenitic steel with different bending types were obtained and plotted. It was established that in the austenitic polycrystalline steel at the deformation degrees ε = 14 and 25 % the distributions of the excess dislocation density are multimodal. In both cases the grain with compound bending is more stressed. The values of the average excess dislocation density in the grains with the compound and simple bending are less at ε = 25 % than that at ε = 14 %. This is explained by a significant relaxation of the internal stresses in steel with the increase of the deformation degree from 14 % to 25 %. The increase of the number of twinning systems and the material volume fraction covered by twinning leads to the internal stress relaxation and consequently to the increase of the excess dislocation density. The presence of microtwins in the deformed material has an influence on the distribution of the excess dislocation density. In the deformed polycrystalline austenitic steel the number of grains with compound bending is increased with the increase of the plastic deformation degree.

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