Numerical study and experimental validation of deformation of <111> FCC CuAl single crystal obtained by additive manufacturing

doi:10.3390/met11040582

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Numerical study and experimental validation of deformation of <111> FCC CuAl single crystal obtained by additive manufacturing	4 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.3390/met11040582

#монокристаллы

#гранецентрированная кубическая решетка

#деформация

#молекулярная динамика

#тетраэдрический дефект упаковки

Title: Numerical study and experimental validation of deformation of <111> FCC CuAl single crystal obtained by additive manufacturing
Creator: Nikonov, Anton Yu.
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Dmitriev, Andrey I.
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Lychagin, Dmitry V.
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Lychagina, Lilia L.
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Bibko, Artem A.
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Novitskaya, Olga S.
Date: 2021
DOI: 10.3390/met11040582
Description: The importance of taking into account directional solidification of grains formed during 3D printing is determined by a substantial influence of their crystallographic orientation on the mechanical properties of a loaded material. This issue is studied in the present study using molecular dynamics simulations. The compression of an FCC single crystal of aluminum bronze was performed along the <111> axis. A Ni single crystal, which is characterized by higher stacking fault energy (SFE) than aluminum bronze, was also considered. It was found that the first dislocations started to move earlier in the material with lower SFE, in which the slip of two Shockley partials was observed. In the case of the material with higher SFE, the slip of a full dislocation occurred via successive splitting of its segments into partial dislocations. Regardless of the SFE value, the deformation was primarily occurred by means of the formation of dislocation complexes involved stair-rod dislocations and partial dislocations on adjacent slip planes. Hardening and softening segments of the calculated stress–strain curve were shown to correspond to the periods of hindering of dislocations at dislocation pileups and dislocation movement between them. The simulation results well agree with the experimental findings.

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collection(s): Геолого-географический факультет | Физический факультет
Identifier: смотреть в электронном каталоге НБ ТГУ
Type: статьи в журналах
Source: Metals. 2021. Vol. 11, № 4. P. 582 (1-16)
Language: eng

Created: 15-06-2022

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Физический факультет

Геолого-географический факультет Numerical study and experimental validation of deformation of <111> FCC CuAl single crystal obtained by additive manufacturing