Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5463415 | Materials Letters | 2017 | 12 Pages |
Abstract
The structure, phase composition, and mechanical properties of commercial zirconium E125 (Zr-2.5% Nb) alloy, which was subjected to high-pressure torsion (HPT) and subsequent annealings, were studied. The HPT of alloy samples 20 mm in diameter at 200 °C at a pressure of 4 GPa using 5 revolutions (N) leads to the formation of grain-subgrain nano- and submicrocrystalline structure characterized by a high fraction of equiaxed grains 80-100 nm in size. The phase α-Zr â (Ï-Zr + β-Zr) transformation during HPT makes the main contribution to the strength of the alloy. Changes in the mechanical properties of the HPT-alloy during heating are related to both the decomposition of Ï-Zr phase and grain growth.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
S.O. Rogachev, S.A. Nikulin, V.M. Khatkevich, M.V. Gorshenkov, R.V. Sundeev, A.A. Veligzhanin,