Behaviour of small cracks during their propagation from Vickers indentations in coarse-grain steel: An experimental investigation
Samo za registrovane korisnike
2011
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
In this investigation we look at the influence of the local residual stresses caused by Vickers-pyramid indenting on the initiation and early propagation of small cracks from indentations in coarse-grain martensitic steel. The size of these indentations is comparable to the grain size. Specimens with and without a local residual stress field were tested on a rotary bending machine. A focused ion beam and a scanning electron microscope were used to reveal the influence of those stresses on the location of the cracks' initiation and the mechanism of the small-crack propagation. The existing local residual stresses assist in the initiation of two cracks at a level lower than the fatigue limit. The early small-crack propagation is gradually obstructed by the residual stress-field configuration until the cracks become non-propagating cracks. At levels higher than the fatigue limit, both cracks succeed in breaking through the compressive stressed domain and link together. From that moment th...e crack begins to behave as a long crack, penetrating outside the indentation into the tensile-stressed domains.
Ključne reči:
Coarse grain / Vickers indentation / Residual stresses / Crack initiation / Crack propagationIzvor:
International Journal of Fatigue, 2011, 33, 12, 1505-1513Izdavač:
- Elsevier Sci Ltd, Oxford
DOI: 10.1016/j.ijfatigue.2011.06.008
ISSN: 0142-1123
WoS: 000296414100001
Scopus: 2-s2.0-80052754124
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Vuherer, T. AU - Milović, Ljubica AU - Gliha, V. PY - 2011 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1855 AB - In this investigation we look at the influence of the local residual stresses caused by Vickers-pyramid indenting on the initiation and early propagation of small cracks from indentations in coarse-grain martensitic steel. The size of these indentations is comparable to the grain size. Specimens with and without a local residual stress field were tested on a rotary bending machine. A focused ion beam and a scanning electron microscope were used to reveal the influence of those stresses on the location of the cracks' initiation and the mechanism of the small-crack propagation. The existing local residual stresses assist in the initiation of two cracks at a level lower than the fatigue limit. The early small-crack propagation is gradually obstructed by the residual stress-field configuration until the cracks become non-propagating cracks. At levels higher than the fatigue limit, both cracks succeed in breaking through the compressive stressed domain and link together. From that moment the crack begins to behave as a long crack, penetrating outside the indentation into the tensile-stressed domains. PB - Elsevier Sci Ltd, Oxford T2 - International Journal of Fatigue T1 - Behaviour of small cracks during their propagation from Vickers indentations in coarse-grain steel: An experimental investigation EP - 1513 IS - 12 SP - 1505 VL - 33 DO - 10.1016/j.ijfatigue.2011.06.008 ER -
@article{ author = "Vuherer, T. and Milović, Ljubica and Gliha, V.", year = "2011", abstract = "In this investigation we look at the influence of the local residual stresses caused by Vickers-pyramid indenting on the initiation and early propagation of small cracks from indentations in coarse-grain martensitic steel. The size of these indentations is comparable to the grain size. Specimens with and without a local residual stress field were tested on a rotary bending machine. A focused ion beam and a scanning electron microscope were used to reveal the influence of those stresses on the location of the cracks' initiation and the mechanism of the small-crack propagation. The existing local residual stresses assist in the initiation of two cracks at a level lower than the fatigue limit. The early small-crack propagation is gradually obstructed by the residual stress-field configuration until the cracks become non-propagating cracks. At levels higher than the fatigue limit, both cracks succeed in breaking through the compressive stressed domain and link together. From that moment the crack begins to behave as a long crack, penetrating outside the indentation into the tensile-stressed domains.", publisher = "Elsevier Sci Ltd, Oxford", journal = "International Journal of Fatigue", title = "Behaviour of small cracks during their propagation from Vickers indentations in coarse-grain steel: An experimental investigation", pages = "1513-1505", number = "12", volume = "33", doi = "10.1016/j.ijfatigue.2011.06.008" }
Vuherer, T., Milović, L.,& Gliha, V.. (2011). Behaviour of small cracks during their propagation from Vickers indentations in coarse-grain steel: An experimental investigation. in International Journal of Fatigue Elsevier Sci Ltd, Oxford., 33(12), 1505-1513. https://doi.org/10.1016/j.ijfatigue.2011.06.008
Vuherer T, Milović L, Gliha V. Behaviour of small cracks during their propagation from Vickers indentations in coarse-grain steel: An experimental investigation. in International Journal of Fatigue. 2011;33(12):1505-1513. doi:10.1016/j.ijfatigue.2011.06.008 .
Vuherer, T., Milović, Ljubica, Gliha, V., "Behaviour of small cracks during their propagation from Vickers indentations in coarse-grain steel: An experimental investigation" in International Journal of Fatigue, 33, no. 12 (2011):1505-1513, https://doi.org/10.1016/j.ijfatigue.2011.06.008 . .