Modelling of Radiation Effect on Deformation and Changes in the Mechanical Properties of Zr–Nb Binary Alloy
O. M. Shchokotova, D. O. Kharchenko, V. O. Kharchenko, V. V. Kupriienko, S. V. Kokhan
Institute of Applied Physics, NAS of Ukraine, 58 Petropavlivska Str., 40000 Sumy, Ukraine
Received: 16.06.2021; final version - 15.09.2021. Download: PDF
The neutron irradiation influence on the mechanical properties change of the binary Zr–Nb alloy under loads in the form of tensile deformation, compression and simple shear is considered. Based on the phase field model with taking into account reaction rate theory in order to determine the defects dynamics and with the elastic component introduction in the framework of nonlinear elasticity theory, the numerical modelling of alloy sample preparation, neutron irradiation of the prepared sample and mechanical loading of alloy samples before and after irradiation is performed. Stress–strain curves, evolution of elastic deformation and displacement fields’ distribution are analysed. The formation and dynamics of slips forming dislocation dipoles are studied. The influence of irradiation temperature, dose rate and strain rate on the ultimate strength and yield strength is studied. The dose dependences of the ultimate strength during tension, compression and shear are obtained. The influence of irradiation and strain rate on the elastic energy density behaviour is analysed.
Key words: binary alloy, irradiation, defects, deformation, mechanical properties.
PACS: 61.72.Hh, 61.72.Lk, 61.80.-x, 62.20.D-, 62.20.F-, 83.50.-v
Citation: O. M. Shchokotova, D. O. Kharchenko, V. O. Kharchenko, V. V. Kupriienko, and S. V. Kokhan, Modelling of Radiation Effect on Deformation and Changes in the Mechanical Properties of Zr–Nb Binary Alloy, Metallofiz. Noveishie Tekhnol., 43, No. 11: 1489—1521 (2021) (in Ukrainian)