Concept

Alliage

Publications associées (447)

Stability and strain-driven evolution of β′ precipitate in Mg-Y alloys

Alloying Mg with rare-earth elements, such as Nd, Gd, or Y, enables hardening from the precipitation of metastable coherent phases during aging at low temperatures. While the aging potential of binary Mg-Nd alloys is relatively limited due to the nucleatio ...

Elsevier2019

Impact of in situ nanomechanics on physical metallurgy

Helena Van Swygenhoven, Johann Michler, Efthymios Polatidis

The mechanical response of modern alloys results from a complex interplay between existing microstructure and its evolution with time under stress. To unravel these processes, in situ approaches intrinsically have a critical advantage to explore the basic ...

2019

Evaluation of the mechanical properties of the heat treated FeCrCuMnNi high entropy alloy

Roland Logé, Ali Shabani

As cast FeCrCuMnNi high entropy alloys were heat treated at different temperatures and times. Structure and mechanical properties of the heat treated alloy were studied using X-Ray diffraction, tensile test, hardness test and scanning electron microscopy. ...

2019

Dynamic wetting in pressure-infiltration of ceramic particle preforms by molten metal

Gionata Schneider

This thesis investigates the interaction between mechanically induced flow of a liquid metal into a porous solid, and kinetic effects at the triple line. The approach is experimental and focuses on metal-ceramic systems for which the literature gives value ...

EPFL2019

Enhanced precipitate growth at reduced temperatures during chemical ordering in deformed red gold alloys

Helena Van Swygenhoven, Steven Van Petegem, Nadine Baluc, Marina Garcia Gonzalez, Samy Hocine

Manufacturing of red gold components relies widely on controlling the formation of ordered precipitates during thermo-mechanical processing. The ordered phase hardens the material, makes it less workable and introduces residual stresses. We show that an in ...

PERGAMON-ELSEVIER SCIENCE LTD2019

Probing alloy formation using different excitonic species: The particular case of InGaN

Nicolas Grandjean, Raphaël Butté, Gordon Jens Callsen

Since the 1960s, alloys are grouped into two classes, featuring bound states in the bandgap (I - GaP:N, ZnTe:O, etc.) or additional, non-discrete, band states (II - SiGe, GaAsP, InGaAs, etc.). Therefore, one can observe either a rich and informative zoo of ...

IEEE2019

Determining the Optimal Phase-Change Material via High-Throughput Calculations

Amina Matt

The discovery and optimization of phase-change and shape memory alloys remain a tedious and expensive process. Here a simple computational method is proposed to determine the ideal phase- change material for a given alloy composed of three elements. Using ...

2019

Appearance of polished 18 karat gold surfaces: linking aesthetics to surface features

Leili Batooli

Impeccable appearance of surfaces is a key constraint in high-end jewelry and watch manufacturing. Based on long tradition in the industry, appearance of products is assessed by trained individuals through visual inspection in designated intervals on the p ...

EPFL2019

Electron backscatter diffraction study of variant selection during ordering phase transformation in L1(0)-type red gold alloy

Roland Logé, Cyril Cayron, Margaux Nathalie Dominique Larcher

A shape-memory effect is known to appear in red gold alloys with compositions close to Au-Cu. The aim of this paper is to study by electron backscatter diffraction (EBSD) the variant selection in the A1 -> L1(0) transformation occurring under stress, in be ...

INT UNION CRYSTALLOGRAPHY2019

Photorealistic modelling of metals from first principles

Nicola Marzari, Gianluca Prandini, Gian-Marco Rignanese

The colours of metals have attracted the attention of humanity since ancient times, and coloured metals, in particular gold compounds, have been employed for tools and objects symbolizing the aesthetics of power. In this work, we develop a comprehensive fr ...

Springer2019

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