Positron Annihilation in Polycrystalline Metals Deformed by Uniaxial Tension

• Authors: W. Rudzińska , J. Pająk , M. Szuszkiewicz , G. Bujnarowski , A. Kluza
• Languages of publication: EN

Abstracts

EN

Angular distributions of the positron annihilation quanta were measured for polycrystalline samples deformed by uniaxial tension up to different deformation degrees. The S parameter as a function of the W parameter was determined. The data obtained for samples elongated up to different elongation degrees indicate that in the proportionality and limited proportionality regions the changes in the physical properties of samples are governed mainly by generation of vacancies and formation and kinetics of transformations of vacancy clusters occurring first of all on the grains of monocrystallites. In the region of plastic deformations the dominant defects are dislocations and vacancies and their aggregates generated due to the formation and movement of the dislocation of the primary and secondary slip. The positron annihilation data are corroborated by the results of the resistometric and tensometric measurements in the proportionality and limited proportionality regions.

Keywords

EN

78.70.Bj

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 107
• Issue: 5
• Pages: 857-863

Dates

published

2005-05

received

2004-09-20

Contributors

author

W. Rudzińska

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

author

J. Pająk

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

author

M. Szuszkiewicz

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

author

G. Bujnarowski

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

author

A. Kluza

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.107.857