Creep Behavior of a Zirconium Alloy Processed by Equal-Channel Angular Pressing

• Authors: V. Sklenicka , J. Dvorak , P. Kral , M. Svoboda , M. Kvapilova , V. Kopylov , S. Nikulin , S. Dobatkin
• Languages of publication: EN

Abstracts

EN

A Zr-2.5 wt%Nb alloy was processed by equal-channel angular pressing and then tested under creep conditions at 623 K using a tensile stress within the range from 120 to 300 MPa. The results show conventional power-law creep with a stress exponent of n > 3 which is consistent with an intragranular dislocation process involving the glide and climb of dislocations. It is demonstrated that diffusion creep is not important in these tests. For comparison purposes, the experiments were conducted using both the unprocessed alloy and after processing by equal-channel angular pressing. It was found that under same testing conditions the measured minimum creep rates in the pressed alloy with ultrafine grain sizes were faster than in the same alloy in a coarse-grained unprocessed condition.

Keywords

EN

81.40.Lm; 62.20.Hg; 81.05.-t; 81.07.Bc; 81.70.Bt

Discipline

• 62.20.Hg: Creep
• 81.05.-t: Specific materials: fabrication, treatment, testing, and analysis(for superconducting materials, see 74.70.-b, and 74.72.-h; for magnetic materials, see 75.50.-y; for optical materials, see 42.70.-a; for dielectric materials, see 77.84.-s; for disperse systems and complex fluids, see 82.70.-y; see also 82.75.-z Molecular sieves, zeolites, clathrates, and other complex solids; for materials properties, see sections 60 and 70)
• 81.07.Bc: Nanocrystalline materials
• 81.70.Bt: Mechanical testing, impact tests, static and dynamic loads(see also 62.20.M- Structural failure of materials; 46.50.+a Fracture mechanics, fatigue, and cracks)
• 81.40.Lm: Deformation, plasticity, and creep(see also 83.50.-v Deformation and flow in rheology)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 3
• Pages: 485-489

Dates

published

2012-09

Contributors

author

V. Sklenicka

• Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 616 62 Brno, Czech Republic

author

J. Dvorak

• Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 616 62 Brno, Czech Republic

author

P. Kral

• Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 616 62 Brno, Czech Republic

author

M. Svoboda

• Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 616 62 Brno, Czech Republic

author

M. Kvapilova

• Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 616 62 Brno, Czech Republic

author

V. Kopylov

• Physico-Technical Institute of NAS Belarus, Kuprevicha 10, 220141 Minsk, Belarus

author

S. Nikulin

• National University of Science and Technology "MISIS", Leninskiy prospect 4, 119049 Moscow, Russia

author

S. Dobatkin

• National University of Science and Technology "MISIS", Leninskiy prospect 4, 119049 Moscow, Russia
• A.A. Baikov Institute of Metallurgy and Materials Science of RAS, Leninskiy prospect 49, 119991 Moscow, Russia

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Identifiers

DOI

10.12693/APhysPolA.122.485