Title variants
Languages of publication
Abstracts
A series of C45 steel samples was burnished by shot peening with varying time of treatment. The samples were investigated by nondestructive positron annihilation techniques: angular correlations of two-quantum annihilation radiation and positron annihilation lifetime spectroscopy. To determine residual stresses present under burnished surface the same samples were studied by destructive Davidenkov method. Change of absolute value of the weighted average of residual stresses over positron range in the series of the samples is in good agreement with change of S/W ratio obtained by angular correlations of two-quantum annihilation radiation. Both parameters increase during first 10 minutes of shot peening and then stabilize. Positron annihilation lifetime spectra allowed to identify two types of structural defects: smaller ones like vacancies or dislocations and bigger - probably clusters of vacancies. Increase in shot peening time causes reduction of positron trapping rate and lifetime rise in bigger defects.
Discipline
- 71.60.+z: Positron states(for positron annihilation, see 78.70.Bj)
- 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)
- 81.20.Wk: Machining, milling
- 81.40.-z: Treatment of materials and its effects on microstructure, nanostructure, and properties
- 81.05.Bx: Metals, semimetals, and alloys
- 81.70.-q: Methods of materials testing and analysis(see also 82.80.-d Chemical analysis and related physical methods of analysis)
Journal
Year
Volume
Issue
Pages
739-746
Physical description
Dates
published
2006-11
received
2006-06-05
Contributors
author
- Institute of Physics, Maria Curie-Skłodowska University, pl. Marii Curie Skłodowskiej 1, 20-031 Lublin, Poland
author
- Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv110n522kz