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Overloading effect on transient fatigue crack growth of Ti-6Al-4V parts produced by Laser Powder Bed Fusion
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| The fatigue crack growth (FCGR) behavior of titanium alloy Ti-6Al-4V submitted to Hot Isostatic Pressing (HIP) through CT specimens manufactured by Laser Powder Bed Fusion (LPBF) is analyzed. Both the crack growth under constant amplitude loading and the transient crack growth behavior after the application of overloads were studied. Crack closure induced by plasticity for the stress ratio R=0 was observed at the Paris regime. The applied overloads for OLR=2 at R=0 caused a FCGR retardation due to the increase of crack closure effect induced by plasticity resulting from the overloads. Rapid transient periods were registered due to small zone affected by the overloads. | 1.31 MB | Adobe PDF |
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Resumo(s)
The fatigue crack growth (FCGR) behavior of titanium alloy Ti-6Al-4V submitted to Hot Isostatic Pressing (HIP) through CT specimens manufactured by Laser Powder Bed Fusion (LPBF) is analyzed. Both the crack growth under constant amplitude loading and the transient crack growth behavior after the application of overloads were studied. Crack closure induced by plasticity for the stress ratio R=0 was observed at the Paris regime. The applied overloads for OLR=2 at R=0 caused a FCGR retardation due to the increase of crack closure effect induced by plasticity resulting from the overloads. Rapid transient periods were registered due to small zone affected by the overloads.
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Citação
L.P. Borrego, J.S. Jesus, J.A.M. Ferreira, J.D. Costa, C. Capela, Overloading effect on transient fatigue crack growth of Ti-6Al-4V parts produced by Laser Powder Bed Fusion, Procedia Structural Integrity, Volume 37, 2022, Pages 330-335, ISSN 2452-3216, https://doi.org/10.1016/j.prostr.2022.01.092.
Editora
Elsevier