The role of the excess volume at the nucleation of plastic deformation in metals

Abstract

The computer simulation results on the atomic structure of the copper crystallite and its behavior in nanoindentation demonstrate the key role of local structural transformations in nucleation of plasticity. The generation of local structural transformations can be considered as an elementary event during the formation of higher scale defects, including partial dislocations and stacking faults. The cause for local structural transformations, both direct fcc-hcp and reverse hcp-fcc, is an abrupt local increase in atomic volume. A characteristic feature is that the values of local volume jumps in direct and reverse structural transformations are comparable with that in melting and lie in the range 5-7 %.

Original language	English
Title of host publication	Proceedings of the 8th International Conference on Computational Plasticity - Fundamentals and Applications, COMPLAS 2015
Publisher	International Center for Numerical Methods in Engineering
Pages	1011-1019
Number of pages	9
ISBN (Print)	9788494424465
Publication status	Published - 2015
Event	13th International Conference on Computational Plasticity, COMPLAS 2015 - Barcelona, Spain Duration: 1 Sep 2015 → 3 Sep 2015

Other

Other	13th International Conference on Computational Plasticity, COMPLAS 2015
Country	Spain
City	Barcelona
Period	1.9.15 → 3.9.15

Keywords

Defects formation
Molecular dynamics
Nanoindentation
Plastic deformation

ASJC Scopus subject areas

Computational Theory and Mathematics
Theoretical Computer Science

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The role of the excess volume at the nucleation of plastic deformation in metals. / Kryzhevich, Dmitrij S.; Korchuganov, Aleksandr V.; Zolnikov, Konstantin P.; Psakhie, Sergei G.

Proceedings of the 8th International Conference on Computational Plasticity - Fundamentals and Applications, COMPLAS 2015. International Center for Numerical Methods in Engineering, 2015. p. 1011-1019.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kryzhevich, DS, Korchuganov, AV, Zolnikov, KP & Psakhie, SG 2015, The role of the excess volume at the nucleation of plastic deformation in metals. in Proceedings of the 8th International Conference on Computational Plasticity - Fundamentals and Applications, COMPLAS 2015. International Center for Numerical Methods in Engineering, pp. 1011-1019, 13th International Conference on Computational Plasticity, COMPLAS 2015, Barcelona, Spain, 1.9.15.

Kryzhevich, Dmitrij S. ; Korchuganov, Aleksandr V. ; Zolnikov, Konstantin P. ; Psakhie, Sergei G. / The role of the excess volume at the nucleation of plastic deformation in metals. Proceedings of the 8th International Conference on Computational Plasticity - Fundamentals and Applications, COMPLAS 2015. International Center for Numerical Methods in Engineering, 2015. pp. 1011-1019

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abstract = "The computer simulation results on the atomic structure of the copper crystallite and its behavior in nanoindentation demonstrate the key role of local structural transformations in nucleation of plasticity. The generation of local structural transformations can be considered as an elementary event during the formation of higher scale defects, including partial dislocations and stacking faults. The cause for local structural transformations, both direct fcc-hcp and reverse hcp-fcc, is an abrupt local increase in atomic volume. A characteristic feature is that the values of local volume jumps in direct and reverse structural transformations are comparable with that in melting and lie in the range 5-7 %.",

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AU - Kryzhevich, Dmitrij S.

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AU - Psakhie, Sergei G.

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AB - The computer simulation results on the atomic structure of the copper crystallite and its behavior in nanoindentation demonstrate the key role of local structural transformations in nucleation of plasticity. The generation of local structural transformations can be considered as an elementary event during the formation of higher scale defects, including partial dislocations and stacking faults. The cause for local structural transformations, both direct fcc-hcp and reverse hcp-fcc, is an abrupt local increase in atomic volume. A characteristic feature is that the values of local volume jumps in direct and reverse structural transformations are comparable with that in melting and lie in the range 5-7 %.

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KW - Molecular dynamics

KW - Nanoindentation

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