Concept

Dureté Rockwell

Publications associées (50)

Niobium nitride based thin films deposited by DC reactive magnetron sputtering

Due to their high hardness, high melting point and high chemical stability, transition metal nitrides present a great interest for various applications. This work constitutes a contribution to the understanding of the properties of Nb based binary and tern ...

EPFL2005

Effects of irradiation on the microstructure and mechanical properties of nanostructured materials

Nanostructured materials should present a good resistance to irradiation because the large volume fraction of grain boundaries can be an important sink for radiation-induced defects. The objective of the present study is to experimentally investigate the i ...

2005

Diffraction from deformed volume holograms: perturbation theory approach

Demetri Psaltis, Wei Liu

We derive the response of a volume grating to arbitrary small deformations, using a perturbative approach. This result is of interest for two applications: (a) when a deformation is undesirable and one seeks to minimize the diffracted field's sensitivity t ...

2005

Assessment of plastic flow and fracture properties with small specimen test techniques for IFMIF-designed specimens

Philippe Spätig, Nadine Baluc, Raul Alejandro Bonadé, Emiliano Campitelli

The primary mission of the international fusion material irradiation facility (IFMIF) is to generate a material database to be used for the design of various components, for the licensing and for the assessment of the safe operation of a demonstration fusi ...

2005

Mechanical properties of highly ordered nanoporous anodic alumina membranes

William Curtin

Young's modulus, hardness and fracture toughness of highly ordered nanoporous alumina (PAA) were measured by nanoindentation and Vickers microindentation. A finite element model that accounts for the anisotropy and the pores was developed to extract the Yo ...

2004

Nanocrystalline electrodeposited Ni: microstructure and tensile properties

Helena Van Swygenhoven, Florian Dalla Torre

The microstructure of commercially available nanocrystalline (nc) electroplated Ni foils is studied by means of Xray diffraction and transmission electron microscopy. It is shown that the microstructure is inhomogeneous and batch-dependent. Tensile propert ...

2002

Tensile tests on optical fibre cables using distributed Brillouin analysis

Luc Thévenaz, Philippe Robert, Alexandre Fellay

On-site distributed strain measurements using an original Brillouin analyser were performed on cables using standard tensile test bench and on critical installations in the Swiss telecom network. ...

Christian Boisrobert, Université de Nantes1999

Behavior of long fatigue cracks in cellular box beam

Alain Nussbaumer

The propagation of long cracks under constant amplitude cyclic loading is studied in complex welded box beams made of high strength low alloy (HSLA) steel. The 8 x 1 x 0.7 m box beams were designed to simulate the cellular structure of a double hull ship b ...

American Society of Civil Engineers1999

Size scaling of strength in heterogeneous materials

William Curtin

The strength of planar arrays of n elastic elements, having heterogeneous strengths and coupled by elastic stress transfer, is studied by simulation and size-scaling analyses. Failure statistics for large n are shown to be controlled by a critical damage c ...

1998

Cavitation erosion, impact intensity and pit size distribution of jet and vortex cavitation

François Avellan, Mohamed Farhat

Three different methods of cavitation erosion measurement are compared and correlated with weight loss rates in two cavitation set-ups: a high-pressure cavitation jet producing a high repetition rate of a wide range of impact intensities and a single vorte ...

ASME1993

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