Forming and deformation behavior of the ultrafine-grained Zr-1Nb alloy

G. P. Grabovetskaya, I. P. Mishin, Ekaterina Nikolaevna Stepanova, I. P. Chernov, D. Yu Bulynko

Research output: Contribution to journalArticle

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Abstract

The influence of intense plastic deformation on the formation of an ultrafine-grain state in Zr-1Nb alloy is considered, when the alloy contains secondary-phase particles in the volume and at the grain boundaries. Pressing with gradual temperature reduction in the range 973-573 K leads to solution of the secondary-phase particles and the formation of ultrafine grains and subgrains (mean size 0.25 ± 0.10 μm) in the alloy structure. In pressing at room temperature with intermediate annealing for 1 h in the range 873-803 K, ultrafine grains and subgrains (mean size 0.45 ± 0.18 μm) are formed in the alloy structure; the secondary-phase particles are retained. The formation of ultrafine-grain structure increases the strength and yield point of Zr-1Nb alloy by a factor of 1.5–2.0, with simultaneous localization of the plastic deformation and decrease in the uniform deformation; the deformation corresponding to failure is also reduced. The presence of secondary-phase particles in the ultrafine-grain structure, like the increase in grain size, prevents localization of the plastic deformation and increases the strain hardening.

Original languageEnglish
Pages (from-to)111-115
Number of pages5
JournalSteel in Translation
Volume45
Issue number2
DOIs
Publication statusPublished - 1 Mar 2015

Fingerprint

Plastic deformation
Crystal microstructure
Strain hardening
Grain boundaries
Ultrafine
Annealing
Temperature

Keywords

  • localized plastic deformation
  • plastic deformation
  • strain hardening
  • ultrafine-grain structure
  • zirconium alloys

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Forming and deformation behavior of the ultrafine-grained Zr-1Nb alloy. / Grabovetskaya, G. P.; Mishin, I. P.; Stepanova, Ekaterina Nikolaevna; Chernov, I. P.; Bulynko, D. Yu.

In: Steel in Translation, Vol. 45, No. 2, 01.03.2015, p. 111-115.

Research output: Contribution to journalArticle

Grabovetskaya, G. P. ; Mishin, I. P. ; Stepanova, Ekaterina Nikolaevna ; Chernov, I. P. ; Bulynko, D. Yu. / Forming and deformation behavior of the ultrafine-grained Zr-1Nb alloy. In: Steel in Translation. 2015 ; Vol. 45, No. 2. pp. 111-115.
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