Study of the interaction of a short fatigue crack with grain boundaries in a cast Al alloy using X-ray microtomography

Ludwig, Wolfgang; Buffière, Jean Yves; Savelli, Stéphane; Cloetens, Peter

doi:10.1016/s1359-6454(02)00320-8

Cited by 175 publications

(113 citation statements)

References 31 publications

Supporting

Mentioning

105

Contrasting

Order By: Relevance

“…The tensile fatigue behaviour of A356-T6 has been the subject of study by a number of researchers [1,2,3,4,5,6,7]. In almost all related studies, casting defects such as intermetallic inclusions, porosity, shrinkages and oxide films have been shown to be present at the origin of the failure.…”

Section: Introductionmentioning

confidence: 99%

Multiaxial Kitagawa analysis of A356-T6

Roy

Nadot

Nadot-Martin

et al. 2011

International Journal of Fatigue

View full text Add to dashboard Cite

Experimental Kitagawa analysis has been performed on A356-T6 containing natural and artificial defects. Results are obtained with a load ratio of R = −1 for three different loadings: tension, torsion and combined tensiontorsion. The critical defect size determined is 400 ±100 µm in A356-T6 under multiaxial loading. Below this value, the microstructure governs the endurance limit mainly through Secondary Dendrite Arm Spacing (SDAS). . It is shown that the CDM and gradient methods are accurate; however fatigue data for three loading conditions is necessary to allow accurate identification of an endurance limit.

show abstract

Section: Introductionmentioning

confidence: 99%

Multiaxial Kitagawa analysis of A356-T6

Roy

Nadot

Nadot-Martin

et al. 2011

International Journal of Fatigue

View full text Add to dashboard Cite

show abstract

“…This stage is termed short crack behaviour and usually exhibits strong deviations with respect to the long crack domain which can be attributed to a combination of mixed mode growth under the influence of the highly multi-axial stress field, plasticity and roughness induced crack closure and crystallographic effects [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of fretting crack propagation

Proudhon

Basseville

2011

Engineering Fracture Mechanics

View full text Add to dashboard Cite

In this work, the finite elements method (FEM) is used to analyse the growth of fretting cracks. FEM can be favourably used to extract the stress intensity factors in mixed mode, a typical situation for cracks growing in the vicinity of a fretting contact. The present study is limited to straight cracks which is a simple system chosen to develop and validate the FEM analysis. The FEM model is tested and validated against popular weight functions for straight cracks perpendicular to the surface. The model is then used to study fretting crack growth and understand the effect of key parameters such as the crack angle and the friction between crack faces. Predictions achieved by this analysis match the essential features of former experimental fretting results, in particular the average crack arrest length can be predicted accurately. PACS numbers: 60.20Mk, 62.20Qp

show abstract

“…[23]. A set of 600 radiographs (scan) was recorded during a 180-degree rotation on a Charge Coupled Device (CCD) camera with a square array of 2048 × 2048 pixels (exposure time: 3 s).…”

Section: D Imaging and Mechanical Testsmentioning

confidence: 99%