The influence of the dislocation distribution heterogeneity degree on the formation of a non-misoriented dislocation cell substructures in f.c.c. metals

8th International Scientific Conference "Issues of Physics and Technology in Science, Industry and Medicine"

物理学;工业技术;医药卫生

Cherepanov, D.N.^1,2 ; Selivanikova, O.V.^1 ; Matveev, M.V.^1

National Research Tomsk Polytechnic University, Tomsk, Russia^1

Tomsk State University of Architecture and Building, Tomsk, Russia^2

关键词: Dislocation cells;    Dislocation distributions;    Dislocation lines;    Dislocation loop;    Formation mechanism;    Frank-Reed sources;    Mean values;    Non-coplanar slip systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/135/1/012007/pdf
DOI  :  10.1088/1757-899X/135/1/012007

来源: IOP

【 摘 要 】

Dislocation loops emitted by Frank-Reed source during crossing dislocations of the non-coplanar slip systems are accumulates jogs on the own dislocation line, resulting in the deceleration of the segments of dislocation loops with high jog density. As a result, bending around of the slowed segments the formation of dynamic dipoles in the shear zone occurs. In the present paper we consider formation mechanism of non-misoriented dislocation cell substructure during plastic deformation of f.c.c. metals and conclude that the increase in the degree heterogeneity of dislocation distribution leads to an increase in the jog density and reduce the mean value of arm dynamic dipoles.