Damage evolution in the AMg6 alloy during high and very high cycle fatigue
Paper presents the “in situ” method for determining of irreversible fatigue damage accumulation, based on the analysis of nonlinear manifestations of the feedback signal in a closed system of an ultrasonic fatigue system. During very high cycle (gigacycle) fatigue, the anomalies of the elastic prope...
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| Veröffentlicht in: | Frattura ed integritá strutturale 2019-07, Vol.13 (49), p.383-395 |
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| creator | Bannikov, Mikhail Bilalov, Dmitry Oborin, Vladimir Naimark, Oleg |
| description | Paper presents the “in situ” method for determining of irreversible fatigue damage accumulation, based on the analysis of nonlinear manifestations of the feedback signal in a closed system of an ultrasonic fatigue system. During very high cycle (gigacycle) fatigue, the anomalies of the elastic properties of the material are appear, which leads to a nonlinearity effect in the amplitude of oscillations. This effect increases with the initiation and growth of fatigue cracks. The technology was applied to samples of AMG-6 alloy with preliminary dynamic deformation at various levels of average stress to determine the moment of initiation and growth of the fatigue crack in very high cycle fatigue regime. This method is applicable for the early detection of fatigue cracks both on the surface and inside the material under cyclic loading in the ultrasonic mode. On the basis of wide-range defining relations for a deformable solid body with mesoscopic defects, a mathematical model has been proposed that can adequately describe behavior of the material during fatigue failure. The results of mathematical modeling are in good agreement with the experimental data |
| doi_str_mv | 10.3221/IGF-ESIS.49.38 |
| format | Article |
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During very high cycle (gigacycle) fatigue, the anomalies of the elastic properties of the material are appear, which leads to a nonlinearity effect in the amplitude of oscillations. This effect increases with the initiation and growth of fatigue cracks. The technology was applied to samples of AMG-6 alloy with preliminary dynamic deformation at various levels of average stress to determine the moment of initiation and growth of the fatigue crack in very high cycle fatigue regime. This method is applicable for the early detection of fatigue cracks both on the surface and inside the material under cyclic loading in the ultrasonic mode. On the basis of wide-range defining relations for a deformable solid body with mesoscopic defects, a mathematical model has been proposed that can adequately describe behavior of the material during fatigue failure. 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During very high cycle (gigacycle) fatigue, the anomalies of the elastic properties of the material are appear, which leads to a nonlinearity effect in the amplitude of oscillations. This effect increases with the initiation and growth of fatigue cracks. The technology was applied to samples of AMG-6 alloy with preliminary dynamic deformation at various levels of average stress to determine the moment of initiation and growth of the fatigue crack in very high cycle fatigue regime. This method is applicable for the early detection of fatigue cracks both on the surface and inside the material under cyclic loading in the ultrasonic mode. On the basis of wide-range defining relations for a deformable solid body with mesoscopic defects, a mathematical model has been proposed that can adequately describe behavior of the material during fatigue failure. The results of mathematical modeling are in good agreement with the experimental data</description><subject>Aluminum base alloys</subject><subject>Anomalies</subject><subject>Crack initiation</subject><subject>Crack propagation</subject><subject>Cyclic loads</subject><subject>Damage accumulation</subject><subject>Deformation</subject><subject>Elastic properties</subject><subject>Fatigue</subject><subject>Fatigue cracks</subject><subject>Fatigue failure</subject><subject>Flaw detection</subject><subject>Formability</subject><subject>Fracture mechanics</subject><subject>High cycle fatigue</subject><subject>Mathematical analysis</subject><subject>Mathematical models</subject><subject>Nonlinear analysis</subject><subject>Nonlinear 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During very high cycle (gigacycle) fatigue, the anomalies of the elastic properties of the material are appear, which leads to a nonlinearity effect in the amplitude of oscillations. This effect increases with the initiation and growth of fatigue cracks. The technology was applied to samples of AMG-6 alloy with preliminary dynamic deformation at various levels of average stress to determine the moment of initiation and growth of the fatigue crack in very high cycle fatigue regime. This method is applicable for the early detection of fatigue cracks both on the surface and inside the material under cyclic loading in the ultrasonic mode. On the basis of wide-range defining relations for a deformable solid body with mesoscopic defects, a mathematical model has been proposed that can adequately describe behavior of the material during fatigue failure. The results of mathematical modeling are in good agreement with the experimental data</abstract><cop>Cassino</cop><pub>Gruppo Italiano Frattura</pub><doi>10.3221/IGF-ESIS.49.38</doi><tpages>13</tpages><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 1971-8993 |
| ispartof | Frattura ed integritá strutturale, 2019-07, Vol.13 (49), p.383-395 |
| issn | 1971-8993 1971-8993 |
| language | eng ; ita |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Aluminum base alloys Anomalies Crack initiation Crack propagation Cyclic loads Damage accumulation Deformation Elastic properties Fatigue Fatigue cracks Fatigue failure Flaw detection Formability Fracture mechanics High cycle fatigue Mathematical analysis Mathematical models Nonlinear analysis Nonlinear systems Nonlinearity Oscillations |
| title | Damage evolution in the AMg6 alloy during high and very high cycle fatigue |
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