The Impact of the Dislocation Density, Lattice and Impurity Friction on the Dynamics of Expansion of a Dislocation Loop in FCC Metals
| Autor: | S. N. Kolupaeva, Anna Shmidt, Anna Kayuda, Aleksander Petelin, Yulia Petelina, Olesya Vorobyeva |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Dislocation creep Materials science Condensed matter physics Mechanical Engineering chemistry.chemical_element 02 engineering and technology Crystal structure 021001 nanoscience & nanotechnology 01 natural sciences Copper Nickel Crystallography chemistry Mechanics of Materials Impurity Peierls stress Lattice (order) 0103 physical sciences General Materials Science Dislocation 0210 nano-technology |
| Zdroj: | Key Engineering Materials. 712:390-393 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.712.390 |
| Popis: | The study of the role of various factors in plastic behavior of materials is carried out using a mathematical model that takes into account fundamental properties of deformation defects in a crystal lattice based on the continuum theory of dislocations. Calculations were performed for copper, nickel, aluminum, and lead using a specialized software system Dislocation Dynamics of Crystallographic Slip. It has been shown that a decrease in the density of dislocations from 1012 m-2 to 1011 m-2 leads to an increase in the dislocation path in 10−16 times, and the maximum velocity in 1.5−2 times in copper and nickel, by nearly 20% in aluminum, and practically remains unchanged in lead. A decrease in the lattice and impurity friction from 2 MPa to 0.1 MPa leads to a linear increase in the path and the maximum velocity of the dislocation by 10−25%. |
| Databáze: | OpenAIRE |
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