Volume 11 Issue 3
Investigation of Structural-Phase States and Features of Plastic Deformation of the Austenitic Precipitation-Hardening Co-Ni-Nb Alloy
Aidyn Tussupzhanov, Dosym Yerbolatuly, Ludmila I. Kveglis and Aleksander Filarowski
1S. Amanzholov East Kazakhstan State University, Department of Physics and Technology, 30 Gvardeiskoi Divisii Str. 34, 070020 Ust-Kamenogorsk, Kazakhstan
2Faculty of Chemistry, Wroclaw University, F. Joliot-Curie Str. 14, 50-383 Wroclaw, Poland
3Polytechnical Institute of Siberian Federal University, Svobodny Ave 79, 660041 Krasnoyarsk, Russia
4Frank Laboratory of Neutron Physics, JINR, 141-980 Dubna, Russia
5Department of Physics, Industrial University of Tyumen, 625-000 Tyumen, Russia
*Author to whom correspondence should be addressed.
Abstract
This article presents the results of investigation of the influence of holding temperature during the quenching process on the microstructure and superplasticity of the Co-Ni-Nb alloy. Temperature-strain rate intervals of the deformation of the superplasticity effects are stated. The optimal regimes of the preliminary treatment by quenching and rolling as well as the routine of the superplastic deformation of the Co-Ni-Nb alloy are defined. The interval of the temperatures of the precipitation, morphology, composition, type and parameters of the lattice of the secondary phase, which appears after the annealing + rolling (to 90%) Co-Ni-Nb alloy, are determined.
Keywords:superplasticity; superplastic deformation; Co-Ni-Nb alloy; microstructure; precipitation; secondary phase; shear transformation zone