Search

Your search keyword '"BUFFIERE, JY"' showing total 25 results
Start Over Author "BUFFIERE, JY"
25 results on '"BUFFIERE, JY"'

1. Identification of the fatigue stress intensity factor threshold for different load ratios R: From fretting fatigue to C (T) fatigue experiments

Author

De Pannemaecker, A, Fouvry, S, Brochu, M, BUFFIERE, JY, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Buffiere, Jean-Yves

Subjects
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2016

2. Synchrotron 3D characterization of arrested fatigue cracks initiated from small tilted notches in steel

Author

Lorenzino, P, BUFFIERE, JY, Okazaki, S, Matsunaga, H, Murakami, Y, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2015

3. Reverse identification of short−long crack threshold fatigue stress intensity factors from plain fretting crack arrest analysis

Author

Pannemaecker, A, Fouvry, S, BUFFIERE, JY, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Buffiere, Jean-Yves

Subjects
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2015

4. 3‐D observations of short fatigue crack interaction with la2mellar and duplex microstructures in a two‐phase titanium alloy

Author

Birosca, Soran, Buffiere, Jy, Karadge, M, Preuss, M, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Buffiere, Jean-Yves

Subjects
[PHYS.MECA.MSMECA] Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2011

5. Corrigendum to 'Three‐dimensional characterization of fatigue cracks in Ti‐6246 using X‐ray tomography and electron backscatter diffraction'[Acta Materialia 57 (2009) 5834−5847]

Author

Birosca, S, BUFFIERE, JY, Garcia‐Pastor, FA, Karadge, M, Babout, L, Preuss, M, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Buffiere, Jean-Yves

Subjects
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2010

6. THOUGHTS ABOUT THE OPTIMUM DATA ACQUISITION GEOMETRYAND TIME RESOLUTION OF MONOCHROMATIC BEAM X‐RAY DIFFRACTION MICROSCOPY EXPERIMENTS

Author

Ludwig, Wolfgang, Reischig, Peter, King, Andrew, Herbig, Michael, Proudhon, Henry, BUFFIERE, JY, Rutishauser, Simon, David, Christian, MATEIS, INSA, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), European Synchrotron Radiation Facility (ESRF), Industrial Engineering and Operations Research Department (IEOR Dept), Columbia University [New York], Centre des Matériaux (MAT), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), and Paul Scherrer Institute (PSI)

Subjects
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2010

7. Three‐dimensional characterization of fatigue cracks in Ti‐6246 using X‐ray tomography and electron backscatter diffraction

Author

Babout, L, Preuss, M, Birosca, S, BUFFIERE, JY, Garcia‐Pastor, FA, Karadge, M, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Buffiere, Jean-Yves

Subjects
[PHYS.MECA.MSMECA] Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2009

8. Etude par microtomographie de la nocivité de la porosité sur la tenue en fatigue de pièces en Al-Si9Cu3

Author

Chabod, A, BUFFIERE, JY, Maire, E, VANDERESSE, N, MAIRE, Eric, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)

Subjects
[SPI.MAT] Engineering Sciences [physics]/Materials, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience; no abstract

Published
2009

9. PART 2-Novel Experimental Techniques-Non Destructive Three Dimensional Imaging of Aluminum Alloys

Author

Maire, E, BUFFIERE, JY, Mokso, R, Cloetens, P, Ludwig, Wolfgang, MAIRE, Eric, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), The Swiss Light Source (SLS) (SLS-PSI), Paul Scherrer Institute (PSI), Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM), and Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SPI.MAT] Engineering Sciences [physics]/Materials, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience; no abstract

Published
2006

10. Influence de l'etat de surface sur la prediction de l'amorcage des fissures en fretting

Author

Proudhon, H, Fouvry, S, BUFFIERE, JY, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Buffiere, Jean-Yves, and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2005

11. High‐resolution, in‐situ, tomographic observations of stress corrosion cracking

Author

Marrow, TJ, Babout, L, Connolly, BJ, Engelberg, D, Johnson, G, BUFFIERE, JY, Withers, PJ, Newman, RC, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Buffiere, Jean-Yves

Subjects
[PHYS.MECA.MSMECA] Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2005

12. Haoran, G. 109 He, G. 135 Hongwei, C. 109 Huang, Z. 39

Author

Hui, XD, Bian, Z, Brien, V, Brooks, CR, Buchholz, K, BUFFIERE, JY, Bush, MB, Capdevila, C, Chang, TL, Chen, C, Buffiere, Jean-Yves, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], ComputingMilieux_MISCELLANEOUS, [PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Abstract

International audience; no abstract

Published
2001

13. DURABILITY AND OPTIMIZATION OF STRUCTURAL MATERIALS-Troisieme partie-Caracterisation-Development of a non destructive characterization technique for the 3D investigation of micro-heterogenous

Author

Buffiere, Jy, Maire, E, Peix, G, Baruchel, J, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), and MAIRE, Eric

Subjects
[SPI.MAT] Engineering Sciences [physics]/Materials, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience; no abstract

Published
2000

14. Processing and Rupture Properties of Model Al/ZrO2 Metal Matrix Composites

Author

Babout, L, Maire, E, Verdu, Catherine, BUFFIERE, JY, Fougeres, R, MAIRE, Eric, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)

Subjects
[SPI.MAT] Engineering Sciences [physics]/Materials, ComputingMilieux_MISCELLANEOUS, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience; no abstract

Published
2000

15. PART 1‐Casting and Solidification‐Pore Characterization in a Model Cast Aluminum Alloy and its Quantitative Relation to Fatigue Life Studied by Synchrotron X‐Ray Microtomography

Author

Savelli, S, BUFFIERE, JY, Fougeres, R, Buffiere, Jean-Yves, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.MECA.MSMECA] Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2000

16. Conception of a high resolution x‐ray computed tomography device; application to damage initiation imaging inside materials

Author

Cendre, E, Duvauchelle, P, Peix, G, BUFFIERE, JY, Babot, D, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Buffiere, Jean-Yves

Subjects
[PHYS.MECA.MSMECA] Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
1999

17. Characterisation of crystallographic evolution during creep deformation of a single crystal superalloy

Author

Shollock, BA, BUFFIERE, JY, Curtis, RV, Henderson, MB, McLean, M, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Buffiere, Jean-Yves

Subjects
[PHYS.MECA.MSMECA] Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
1997

18. Caractérisation de l'endommagement dans les matériaux de structure par tomographie haute résolution par rayons X

Author

Peix, G, BUFFIERE, JY, SALOME, M, Babot, D, Baruchel, J, Buffiere, Jean-Yves, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.MECA.MSMECA] Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
1997

19. A dislocation based criterion for the raft formation in nickel‐based superalloys single crystals

Author

BUFFIERE, JY, Ignat, M, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Buffiere, Jean-Yves

Subjects
[PHYS.MECA.MSMECA] Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
1995

21. Influence of intermetallic particles on shot fatigue crack initiation in AA2050-T8 and AA7050-T7451

Author

Samuel Forest, Armelle Danielou, Erembert Nizery, Jean-Yves Buffiere, Henry Proudhon, Centre des Matériaux ( MAT ), MINES ParisTech - École nationale supérieure des mines de Paris-PSL Research University ( PSL ) -Centre National de la Recherche Scientifique ( CNRS ), Matériaux, ingénierie et science [Villeurbanne] ( MATEIS ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique ( CNRS ) -Institut National des Sciences Appliquées de Lyon ( INSA Lyon ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ), Constellium CRV, CRV Voreppe, Buffiere, JY and Brune, M and Morel, F and Nadot, Y, Centre des Matériaux (MAT), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Constellium Technology Center (C-TEC), Buffiere, JY and Brune, M and Morel, and F and Nadot

Subjects
Materials science, Aspect ratio, [ SPI.MAT ] Engineering Sciences [physics]/Materials, Intermetallic, Mechanical engineering, Fatigue testing, 02 engineering and technology, 021001 nanoscience & nanotechnology, Hot rolled, Matrix (geology), Cross section (physics), 020303 mechanical engineering & transports, 0203 mechanical engineering, lcsh:TA1-2040, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], Particle, Cyclic loading, Composite material, 0210 nano-technology, lcsh:Engineering (General). Civil engineering (General)
Abstract

International audience; Fatigue crack initiation at particles is studied in hot rolled 2050-T8 and 7050-T7451 material, using 1 to 4 mm cross section specimens. Both size and aspect ratio of particles are observed to affect their probability of being damaged. In 2050-T8 material, the probability that a matrix crack initiate at a cracked particle increases with its size, and no effect of aspect ratio is observed. In 2050-T8 specimens, matrix cracks initiate at both precracked (Al, Cu, Fe, Mn) particles and particles cracked during cycling. Initiation in 7050-T74 specimens occur on Mg2Si particles which may be cracked or debonded, and Al7Cu2Fe particles that are cracked during cyclic loading.

Published
2014
Full Text
View/download PDF

22. Fatigue notch sensitivity as a function of the notch to grain size relationship

Author

A. Navarro, P. Lorenzino, Matériaux, ingénierie et science [Villeurbanne] ( MATEIS ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique ( CNRS ) -Institut National des Sciences Appliquées de Lyon ( INSA Lyon ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ), Buffiere, JY and Brune, M and Morel, F and Nadot, Y, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Buffiere, JY and Brune, M and Morel, and F and Nadot

Subjects
Work (thermodynamics), Engineering drawing, Materials science, [ SPI.MAT ] Engineering Sciences [physics]/Materials, food and beverages, 02 engineering and technology, Function (mathematics), 021001 nanoscience & nanotechnology, Concentrator, Microstructure, Grain size, [SPI.MAT]Engineering Sciences [physics]/Materials, Stress (mechanics), 020303 mechanical engineering & transports, 0203 mechanical engineering, lcsh:TA1-2040, Range (statistics), Sensitivity (control systems), Composite material, lcsh:Engineering (General). Civil engineering (General), 0210 nano-technology
Abstract

Conference on Fatigue Design and Material Defects (FDMD-JIP), Paris, FRANCE, JUN 11-13, 2014; International audience; This work presents experimental results showing the mode I fatigue behaviour of holed components as a function of the hole to grain size relationship. A wide range of notch size to grain size ratios are used, including cases where the notch size is on the order of, or even smaller, than the grain size. Making through-holes in the order of the grain size is very difficult in practice. So the technique used in this paper is to manufacture materials with very large grain size, on the order of a millimetre or even centimetre, then usual machines and tools can be used for making the notches. After the specimens are obtained and tested, the notch sensitivity is evaluated and it is shown how the notch sensitivity index of any material must always be defined in terms of its microstructure. It was found that for the same specimen geometry and loading conditions and identical stress concentrators, the influence of the stress concentrator is directly dependent on the relationship between their dimension and the grain size.

Published
2014
Full Text
View/download PDF

23. Damage tolerant design of additively manufactured metallic components subjected to cyclic loading: State of the art and challenges.

Author

Zerbst U, Bruno G, Buffiere JY, Wegener T, Niendorf T, Wu T, Zhang X, Kashaev N, Meneghetti G, Hrabe N, Madia M, Werner T, Hilgenberg K, Koukolíková M, Procházka R, Džugan J, Möller B, Beretta S, Evans A, Wagener R, and Schnabel K

Abstract

Undoubtedly, a better understanding and the further development of approaches for damage tolerant component design of AM parts are among the most significant challenges currently facing the use of these new technologies. This article presents a thorough overview of the workshop discussions. It aims to provide a review of the parameters affecting the damage tolerance of parts produced by additive manufacturing (shortly, AM parts) with special emphasis on the process parameters intrinsic to the AM technologies, the resulting defects and the residual stresses. Based on these aspects, basic concepts are reviewed and critically discussed specifically for AM materials: Criteria for damage tolerant component design;Criteria for the determination of fatigue and fracture properties;Strategies for the determination of the fatigue life in dependence of different manufacturing conditions;Methods for the quantitative characterization of microstructure and defects;Methods for the determination of residual stresses;Effect of the defects and the residual stresses on the fatigue life and behaviour. We see that many of the classic concepts need to be expanded in order to fit with the particular microstructure (grain size and shape, crystal texture) and defect distribution (spatial arrangement, size, shape, amount) present in AM (in particular laser powder bed fusion). For instance, 3D characterization of defects becomes essential, since the defect shapes in AM are diverse and impact the fatigue life in a different way than in the case of conventionally produced components. Such new concepts have immediate consequence on the way one should tackle the determination of the fatigue life of AM parts; for instance, since a classification of defects and a quantification of the tolerable shapes and sizes is still missing, a new strategy must be defined, whereby theoretical calculations (e.g. FEM) allow determining the maximum tolerable defect size, and non-destructive testing (NDT) techniques are required to detect whether such defects are indeed present in the component. Such examples show how component design, damage and failure criteria, and characterization (and/or NDT) become for AM parts fully interlinked. We conclude that the homogenization of these fields represents the current challenge for the engineer and the materials scientist., Competing Interests: Declaration of interests The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Published
2021
Full Text
View/download PDF

24. Location, location &size: defects close to surfaces dominate fatigue crack initiation.

Author

Serrano-Munoz I, Buffiere JY, Mokso R, Verdu C, and Nadot Y

Abstract

Metallic cast components inevitably contain defects such as shrinkage cavities which are inherent to the solidification process. Those defects are known to significantly alter the fatigue life of components. Yet very little is known, quantitatively, on the dangerosity of internal casting defects compared to surface ones. In this study, fatigue specimens containing controlled internal defects (shrinkage pores) are used to foster internal cracking. In situ fatigue tests monitored by X ray synchrotron tomography revealed that the internal nucleation and propagation of cracks was systematically overran by surface cracking initiated at castings defects up to ten times smaller than the internal ones. These findings indicate that the presence of internal defects in cast components can be tolerated to a larger extent than is allowed by nowadays standards.

Published
2017
Full Text
View/download PDF

25. X-ray tomographic imaging of Ti/SiC composites.

Author

McDonald SA, Preuss M, Maire E, Buffiere JY, Mummery PM, and Withers PJ

Subjects
Alloys, Composite Resins, Materials Testing, Surface Properties, Carbon Compounds, Inorganic chemistry, Silicon Compounds chemistry, Titanium chemistry, Tomography, X-Ray Computed methods
Abstract

In this paper, high-resolution tomographic synchrotron X-ray imaging is applied to study the occurrence and evolution of damage in Ti-6Al-4V/SCS6 SiC fibre composite materials. Three composite morphologies of increasing complexity have been studied, namely single fibre, single-ply and multi-ply composites. The single fibre composite was strained to full fibre fragmentation and the progressive introduction of damage monitored. For the single-ply composite, damage was introduced deliberately by laser drilling to establish the effect of damaged fibres on their neighbours, whereas for the multi-ply composite the morphology of a fibre bridging fatigue crack was studied. In addition to traditional mode I fibre fractures, subsequent fibre wedge cracks were observed presumably nucleating from damage introduced into the fibre surface by the first fracture event. In addition to these crack morphologies, spiral defects were observed for the single ply during failure. Finally, for the multi-ply composite, the matrix crack front showed a number of characteristic features, including advancement in fibre-free regions, crack bifurcation near fibres and different crack plane heights either side of a fibre.

Published
2003
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results