In situ synchrotron ultrasonic fatigue testing device for 3D characterisation of internal crack initiation and growth
Article dans une revue avec comité de lecture
This work presents a new ultrasonic fatigue testing device for studying the initiation and propagation mechanisms of internal microstructurally short fatigue cracks using in situ synchrotron tomography. Its principle is described as well as the method used for automatically detecting crack initiation and its subsequent growth. To promote internal crack initiation, specimens containing internal casting defects were tested between the high cycle and very high cycle fatigue regimes (107-109 cycles). Preliminary results show the ability of this new device to initiate an internal microstructurally short crack in a reasonable testing time and monitor its growth.
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Internal fatigue crack monitoring during ultrasonic fatigue test using temperature measurements and tomography Article dans une revue avec comité de lectureRANC, Nicolas; MESSAGER, Alexandre; JUNET, A.; PALIN-LUC, Thierry; BUFFIÈRE, J.Y.; SAINTIER, Nicolas; ELMAY, Wafa; MANCINI, L.; KING, A.; NADOT, Yves (Elsevier, 2022-09)Very high cycle fatigue fracture is often associated with internal crack propagation and one major problem to study the initiation and the propagation of this internal crack is to detect its initiation and quantify its ...
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Article dans une revue avec comité de lectureThis paper proposes a volumetric high cycle fatigue (HCF) strength criterion able to quantify the influence of natural corrosion pits on the fatigue limit of a martensitic stainless steel with high mechanical strength. ...
Effect of mean shear stress on the fatigue strength of notched components under multiaxial stress state Communication avec acteBENNEBACH, Mohamed; PALIN-LUC, Thierry; MESSAGER, Alexandre (Elsevier, 2018)The effect of a static and intermittent shear stress on the HCF strength of two quenched and tempered steel grades used to produce shafts in crane industry was studied on notched specimens (Kt=1.7 and 2.7) for being ...