Dislocation jogs impact on the expansion of octahedral dislocation loop and the point defects generation in plastically deformed FCC crystals
The paper studies the influence of jogs, formed on screw segments of a dislocation loop during the intersection of dislocations of non-coplanar slip systems, on the dynamics of expansion of dislocation loops emitted by Frank-Read sources and the generation of point defects during drawing of these jogs in an FCC crystal. The model of motion of segments of an expanding dislocation loop, taking into account the influence of jogs on the resistance to motion of dislocation segments of screw orientation, is presented in the form of three differential equations, two of which describe the dynamics of loop motion, and the third one describes the kinetics of jogs. The equation of dislocation jogs kinetics contains a constant average density of jogs as a parameter. It is shown that the degree of misorientation of the dislocation structure leads to differences in the dynamics of jogs accumulation, in the values of the average density of jogs on screw segments, and in the velocity of motion of screw and edge segments at different stages of deformation.
Keywords
single crystals,
FCC lattice,
metals,
shear plastic deformation,
octahedral slip,
shear stress,
mathematical modeling,
point defects,
dislocations,
dislocation jogs density,
dislocation sourceAuthors
| Cherepanov Dmitry N. | Tomsk State University of Architecture and Building; Tomsk State University of Control Systems and Radioelectronics | d_n_ch@mail.ru |
| Vovnova Irina G. | Tomsk State University of Architecture and Building | irinavov12@mail.ru |
| Solov’eva Yulia V. | Tomsk State University of Architecture and Building | j_sol@tsuab.ru |
| Starenchenko Vladimir A. | Tomsk State University of Architecture and Building | star@tsuab.ru |
Всего: 4
References
Heidenreich R.D., Shockley W. // J. Appl. Phys. - 1947. - V. 18. - No. 1029. - P. 1029-1031. - DOI: 10.1063/1.1697576.
Shun Kondo, Naoya Shibata, Yuichi Ikuhara // Scripta Mater. - 2025. - V. 258. - P. 116513. - DOI: 10.1016/j.scriptamat.2024.116513.
Yifan Wang, Wu-Rong Jian, Wei Cai // Scripta Mater. - 2025. - V. 260. - P. 116597. - DOI: 10.1016/j.scriptamat.2025.116597.
Mott N.F. // Phil. Mag. Ser. 1. - 1952. - V. 43. - No. 346. - P. 1151-1178. - DOI: 10.1080/14786441108521024.
Seitz F. // Adv. Phys. (suppl. to Phil. Mag.). - 1952. - V. 1. - No. 1. - P. 43-90. - DOI: 10.1080/00018735200101161.
Cottrell A. // Nature. - 1956. - V. 178. - P. 1090-1092. - DOI: 10.1038/1781090a0.
Hoffmanner L.A. Doctoral dissertation. - Pittsburg: Carnegie Institute of Technology, 1964.
Хирт Дж., Лоте И. Теория дислокаций. - М.: Атомиздат, 1972. - 600 с.
Nicholas J.F. // Acta Met. - 1959. - V. 7. - No. 8. - P. 544-548. - DOI: 10.1016/0001-6160(59)90190-7.
Mott N.F. // Trans. Met. Soc. AIME. - 1960. - V. 218. - P. 962-1112.
Hirsch P.B. // Phil. Mag. - 1962. - V. 7. - No. 73. - P. 67-93. - DOI: 10.1080/14786436208201859.
Инденбом В.Л., Орлов А.Н. // УФН. - 1962. - Т. 76. - Вып. 3. - С. 557-591.
Orlov A.N. // Theory of Crystal Defects. - Prague: Publishing House of Czechoslovak Academy of Sciences, 1966. - P. 317-338.
Набарро Ф.Р., Базинский З.С., Холт Д.Б. Пластичность чистых монокристаллов. - М.: Металлургия, 1967. - 214 с.
Фридель Ж. Дислокации: пер. с англ. - М.: Мир, 1967. - 644 с.
Попов Л.Е., Кобытев В.С., Ковалевская Т.А. // Изв. вузов. Физика. - 1982. - T. 25. - № 6. - С. 56-82.
Kressel H., Brown N. // J. Appl. Phys. - 1967. - V. 38. - No. 6. - P. 1618-1625. - DOI: 10.1063/1.1709733.
Ungár Е., Schafler E., Hanák P., et al. // Mater. Sci. Eng. A. - 2007. - V. 426. - No. 1. - P. 398-401. - DOI: 10.1016/j.msea.2006.03.156.
Старенченко В.А., Черепанов Д.Н., Соловьева Ю.В., Попов Л.Е. // Изв. вузов. Физика. - 2009. - T. 52. - № 4. - С. 60-71.
Старенченко В.А., Черепанов Д.Н., Селиваникова О.В. // Изв. вузов. Физика. - 2014. - Т. 57. - № 2. - С. 4-14.
Черепанов Д.Н. // Изв. вузов. Физика. - 2024. - Т. 67. - № 10. - С. 67-78.
Старенченко В.А., Черепанов Д.Н., Слободской М.И. // Изв. вузов. Физика. - 2009. - T. 52. - № 9/2. - С. 108-117.
Черепанов Д.Н., Старенченко В.А., Селиваникова О.В., Барбакова Е.А. // Изв. вузов. Физика. - 2014. - Т. 57. - № 2/2. - C. 90-98.
