Positron annihilation in steel burnishedby vibratory shot peening
Artykuł w czasopiśmie
| Status: | |
| Autorzy: | Zaleski Radosław, Zaleski Kazimierz |
| Rok wydania: | 2006 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 5 |
| Wolumen/Tom: | 110 |
| Strony: | 739 - 746 |
| Web of Science® Times Cited: | 7 |
| Scopus® Cytowania: | 4 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| A series of C45 steel samples was burnished by shot peening with vary-ing time of treatment. The samples were investigated by nondestructivepositron annihilation techniques: angular correlations of two-quantum an-nihilation radiation and positron annihilation lifetime spectroscopy. To de-termine residual stresses present under burnished surface the same sampleswere studied by destructive Davidenkov method. Change of absolute value ofthe weighted average of residual stresses over positron range in the series ofthe samples is in good agreement with change ofS/Wratio obtained by an-gular correlations of two-quantum annihilation radiation. Both parametersincrease during first 10 minutes of shot peening and then stabilize. Positronannihilation lifetime spectra allowed to identify two types of structural de-fects: smaller ones like vacancies or dislocations and bigger — probably clus-ters of vacancies. Increase in shot peening time causes reduction of positrontrapping rate and lifetime rise in bigger defects. |
