Simulation of plastic deformation initiation in crystal materials under dynamic loading

D. S. Kryzhevich, K. P. Zolnikov, S. G. Psakhie

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

1 Цитирования (Scopus)

Аннотация

In the last decade the scope of experimental and theoretical investigations into the initial stage of plastic deformation in solids has been expanded significantly. Nevertheless its atomistic mechanisms are as yet imperfectly understood. One of the major open questions concerns the existence of proto-defects, i.e. local structural distortions which provide the basis for the formation of conventional structural defects carriers of plastic deformation. The investigations were applied to crystallines with different boundary types (free surfaces and grain boundaries) and different type of crystal lattice. The influence of loading intensity and deformation scheme was studied. Simulation was performed for various temperatures from 50 K to 500 K. It has been demonstrated that there is a certain threshold value of strain at which zones with local structural changes grow almost abruptly. A detailed analysis of atomic displacements at the stage of nucleation of local structural distortions (protodefects) has revealed that their formation is related with specific rearrangement in the first and second coordination spheres of one of the atoms. It is realized in the conditions of local expansion of the atomic volume.

Язык оригиналаАнглийский
Название основной публикацииProcedia Engineering
Страницы1579-1587
Число страниц9
Том2
Издание1
DOI
СостояниеОпубликовано - апр 2010
Событие10th International Fatigue Congress, FATIGUE 2010 - Prague, Чешская Республика
Продолжительность: 6 июн 201011 июн 2010

Другое

Другое10th International Fatigue Congress, FATIGUE 2010
СтранаЧешская Республика
ГородPrague
Период6.6.1011.6.10

ASJC Scopus subject areas

  • Engineering(all)

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  • Цитировать

    Kryzhevich, D. S., Zolnikov, K. P., & Psakhie, S. G. (2010). Simulation of plastic deformation initiation in crystal materials under dynamic loading. В Procedia Engineering (1 ред., Том 2, стр. 1579-1587) https://doi.org/10.1016/j.proeng.2010.03.170