Structure and Mechanical Properties of a Zr-1Nb Alloy, Obtained by the Method of Severe Plastic Deformation

Effect of severe plastic deformation and subsequent annealing in the temperature range of 573–873 К on the structural and phase state of a heterophase Zr-1Nb alloy are studied by electron microscopy and X-ray diffraction analysis. Dissolving of the secondary phases particles and formation of the ult...

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Bibliographic Details
Published in:	Materials today : proceedings Vol. 2; no. 1; pp. 365 - 369
Main Authors:	Stepanova, E.N., Grabovetskaya, G.P., Mishin, I.P., Bulinko, D.Yu
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 2015
Subjects:	deformation behavior localization of plastic deformation severe plastic deformation ultrafine-grained structure zirconium alloy deformation behavior ultrafine-grained structure severe plastic deformation zirconium alloy localization of plastic deformation
Online Access:	Get full text
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Summary:	Effect of severe plastic deformation and subsequent annealing in the temperature range of 573–873 К on the structural and phase state of a heterophase Zr-1Nb alloy are studied by electron microscopy and X-ray diffraction analysis. Dissolving of the secondary phases particles and formation of the ultrafine-grained grain-subgrain structure with an average element size of (0.25±0.1) μm is established to occur in the process of severe plastic deformation. Precipitation of nanoscale particles of secondary phases during subsequent annealing allows to form in alloy the ultrafine-grained structure stable up to 523 К. Formation of the ultrafine-grained structure in the Zr-1Nb alloy leads to increasing its strength characteristics by 1.5–2 times and simultaneous reducing of deformation to failure by 2 times.
ISSN:	2214-7853 2214-7853
DOI:	10.1016/j.matpr.2015.04.033