- Tytuł:
- Positron Annihilation in Steel Burnished by Vibratory Shot Peening
- Autorzy:
-
Zaleski, R.
Zaleski, K. - Powiązania:
- https://bibliotekanauki.pl/articles/2047165.pdf
- Data publikacji:
- 2006-11
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
78.70.Bj
71.60.+z
62.20.Fe
62.20.Mk
81.20.Wk
81.40.-z
81.70.-q
81.05.Bx - Opis:
- 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.
- Źródło:
-
Acta Physica Polonica A; 2006, 110, 5; 739-746
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł