Dislocation kinetics during plastic deformation of two-dimensional polycrystals

• Дата: 2019
• Автори: Badiyan, E.E., Tonkopryad, A.G., Ftomov, Ye.V., Shekhovtsov, O.V.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2019
• Назва видання: Вопросы атомной науки и техники
• Теми: Physics of radiation damages and effects in solids
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/194932
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Dislocation kinetics during plastic deformation of two-dimensional polycrystals / E.E. Badiyan, A.G. Tonkopryad, Ye.V. Ftomov, O.V. Shekhovtsov // Problems of atomic science and technology. — 2019. — № 2. — С. 25-29. — Бібліогр.: 18 назв. — англ.

The dislocation-kinetic approach is applied to the study of plastic flow of plate specimens of two-dimensional polycrystals of high purity metals under uniaxial tension with a constant strain rate at moderate temperatures. A dislocation-kinetic equation is formulated. It takes into account the role of the free surface of a plate specimen, which is the source and sink of dislocations, and the strengthening effect of through grain boundaries in a twodimensional polycrystal. To calculate tensile stress-strain curves, the kinetic equation was transformed using the Taylor strain hardening law and an analytical solution was obtained for this equation. Using the example of plate specimens of two-dimensional polycrystals of high purity aluminium (99.999 at.%) it was shown that the calculation results are in good agreement with experimental data.