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David Delafosse
École Normale Supérieure
62Publications
10H-index
542Citations
Publications 62
Newest
Published on Jan 1, 2019
Xavier Feaugas , David Delafosse10
Estimated H-index: 10
Abstract: Many mechanisms have been proposed to describe the different hydrogen embrittlement processes. The materials' variability and their properties, their conditions of use and the nature of the surrounding environment make it difficult to establish a single fundamental theory or approach to describe hydrogen embrittlement (HE). Experimental validations of these mechanisms are often based on a set of conditions (metallurgy, mechanical loading, surface hydrogen activity, volume concentration...
Published on Aug 1, 2017in Ceramics International 3.45
Virginia Melli4
Estimated H-index: 4
(Polytechnic University of Milan),
Louis-Philippe Lefebvre15
Estimated H-index: 15
(National Research Council)
+ 5 AuthorsLuigi De Nardo15
Estimated H-index: 15
(Polytechnic University of Milan)
Abstract Consolidation processes aimed at manufacturing cellular solids from bioglasses often result in a glass-ceramic microstructure, whose response to aqueous environment affects their performance. In this study, we evaluated the microstructure and the effect of crystallization on the dissolution mechanism of a Bioglass®-based glass-ceramic scaffold, produced with a powder metallurgy inspired technology. All the experiments are conducted in a controlled aqueous environment in order to avoid n...
Published on Jan 1, 2017
Jenny Faucheu6
Estimated H-index: 6
,
John Boult , David Delafosse10
Estimated H-index: 10
Holistic approach for intelligent innovation is obtained in integrated design teams by mixing up backgrounds and skills into multidiscipline teams. However, is mixing enough? To go further than a simple addition of skills and create a synergy, the key ingredient is to favour communication and understanding between individuals in the team. Our aim is to impulse the establishment of commons languages and favour constructive interactions between future engineers and future designers. It aims at pre...
Published on Apr 1, 2016in Color Research and Application 1.03
Caterina Passaro1
Estimated H-index: 1
('ENS Paris': École Normale Supérieure),
J.S. Bidoret1
Estimated H-index: 1
(IMT: Institut Mines-Télécom)
+ 2 AuthorsOlivier Eterradossi1
Estimated H-index: 1
(IMT: Institut Mines-Télécom)
In this article, we investigate the benefit of including texture information in models of gloss perception of low-gloss textured achromatic plastic surfaces from the automotive industry. 4 models are compared: two gloss prediction models including texture information, one using data from reflectometry (M1) and one using data from goniophotometry (M2), and two models using data from reflectometry (M3) or goniophotometry (M4) alone. Both texture-corrected models (M1-M2) outclass the uncorrected in...
Published on Oct 1, 2015in Color Research and Application 1.03
Renée Charrière3
Estimated H-index: 3
(Ecole nationale supérieure des mines de Saint-Étienne),
Grégoire Lacaille1
Estimated H-index: 1
(Ecole nationale supérieure des mines de Saint-Étienne)
+ 2 AuthorsDavid Delafosse10
Estimated H-index: 10
(Ecole nationale supérieure des mines de Saint-Étienne)
We investigate the gonioapparent character of colored anodized titanium surfaces. In appropriate experimental conditions, the anodizing process generates a homogeneous oxide layer at the surface of the metal, with a thickness comparable with the visible wavelengths of light. The anodized metallic surfaces thus exhibit interferential colors, which depend on the thickness of the oxide layer and have the particularity to vary according to the illumination and observation directions. They are said t...
Published on Jun 1, 2015in Acta Materialia 7.29
G. Girardin1
Estimated H-index: 1
('ENS Paris': École Normale Supérieure),
C. Huvier2
Estimated H-index: 2
(University of La Rochelle)
+ 1 AuthorsX. Feaugas22
Estimated H-index: 22
(University of La Rochelle)
Abstract Various forms of the plastic deformation in single crystals are studied in pure and hydrogen-containing nickel and nickel alloys oriented for single slip [1 3 5] and strained in the stage III regime (shear strain, γ = 0.8). The heterogeneity of deformation is investigated at two distinct scales: slip bands and dislocation structures, using atomic force microscopy (AFM) and transmission electronic microscopy (TEM). Size and distribution of slip band thicknesses and geometrically necessar...
Published on Apr 22, 2015in Current Nanoscience 1.59
Jenny Faucheu6
Estimated H-index: 6
,
Natalia Matsapey2
Estimated H-index: 2
+ 2 AuthorsDavid Delafosse10
Estimated H-index: 10
Anodizing of aluminum generates a nanoporous alumina layer comprising cylindrical nanopores extending essentially perpendicular to the substrate. Visual observation of such nanoporous layers shows a colored specular reflectance consistent with reflectance spectrum measurements. Such structural colors raise interest in particular for producing non-fading colors. However the optical behavior is complex and requires specific characterization setups and modelling approaches. A morphological and opti...
Published on Jan 1, 2015
Jenny Faucheu6
Estimated H-index: 6
,
Antonio Caroli1
Estimated H-index: 1
+ 1 AuthorsDavid Delafosse10
Estimated H-index: 10
Selection and definition of materials surfaces in product design can be driven by the sensory effect conceived. Certain characteristics that can be perceived through the sense of vision can also be perceived through the sense of touch. As a consequence, the sense of touch also plays an important role in functional user-product interactions. In this paper, a specific setup dedicated to Napping® evaluation with a focus on visual and tactile modalities is presented, using untrained subjects. This p...
Published on Jan 1, 2015in Advanced Engineering Materials 2.91
Natalia Matsapey2
Estimated H-index: 2
(Ecole nationale supérieure des mines de Saint-Étienne),
Jenny Faucheu6
Estimated H-index: 6
(Ecole nationale supérieure des mines de Saint-Étienne)
+ 1 AuthorsDavid Delafosse10
Estimated H-index: 10
(Ecole nationale supérieure des mines de Saint-Étienne)
Surface finishes based on structural colors raise interest in product design and architecture in that long lasting colored surfaces can be produced with low risks if color fading. In this paper, aluminum surface are patterned through anodization with additional chemical post-treatment. This electrochemical technique is advantageous in that it is already industrially mature and enables the treatment of large surfaces. The resulting surface shows self-organized nanopatterns that lead to specific c...
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