| Download | - View accepted manuscript: A study on fatigue crack growth behavior subjected to a single tensile overload : Part I : An overload-induced transient crack growth micromechanism (PDF, 990 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1016/j.actamat.2010.09.049 |
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| Author | Search for: Lee, S. Y.; Search for: Liaw, P. K.; Search for: Choo, H.; Search for: Rogge, R. B.1 |
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| Affiliation | - National Research Council of Canada. NRC Canadian Neutron Beam Centre
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| Format | Text, Article |
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| Subject | Fatigue crack growth; Overload; Crack closure; Electric potential; Neutron diffraction |
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| Abstract | Neutron diffraction and electric potential experiments were carried out to investigate the growth behavior of a fatigue crack subjected to a single tensile overload. The specific objectives were to (i) probe the crack tip deformation and fracture behaviors under applied loads; (ii) examine the overload-induced transient crack growth micromechanism; (iii) validate the effective stress intensity factor range based on the crack closure approach as the fatigue crack tip driving force; and (iv) establish a quantitative relationship between the crack tip driving force and crack growth behavior. Immediately after a single tensile overload was introduced and then unloaded, the crack tip became blunt and enlarged compressive residual stresses in both magnitude and zone size were observed around the crack tip. The results show that the combined contributions of the overload-induced enlarged compressive residual stresses and crack tip blunting with secondary cracks are responsible for the observed changes in the crack opening load and the resultant post-overload transient crack growth behavior. |
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| Publication date | 2011-01-01 |
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| In | |
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| Note | Erratum published in volume 59, issue 10, page 4253, June 2011. DOI: 10.1016/j.actamat.2011.02.041 |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 18703290 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 042b0393-3081-494a-81e7-a68f3f1decad |
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| Record created | 2011-11-10 |
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| Record modified | 2020-04-21 |
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