Publications related to Linking electronic structure calculations to generalized stacking fault energies in multicomponent alloys

Deformation twinning mechanism in magnesium at the microscale: strain rate, temperature and orientation effects

The project aims to validate some recent theoretical developments on the deformation twinning nucleation mechanism in HCP metals through small-scale mechanic experiments. To this end, a systematic investigation of the mechanical response of pure magnesium ...

EPFL2022

On the scale dependence in the dynamics of frictional rupture: Constant fracture energy versus size-dependent breakdown work

Marie Estelle Solange Violay, Mathias Alexandre David Lebihain, François Xavier Thibault Passelègue, Fabian Barras, Federica Paglialunga

Potential energy stored during the inter-seismic period by tectonic loading around faults is released during earthquakes as radiated energy, frictional dissipation and fracture energy. The latter is of first importance since it is expected to control the n ...

2022

Atomic scale investigations of fracture in metal alloys

Eleanor Yi Kei Mak

The demand for metal alloys with superior structural performance in industrial applications continues to increase, as does the need for more-energy efficient materials and methods. Many materials that are otherwise attractive for structural applications ar ...

EPFL2021

A ductility criterion for bcc high entropy alloys

William Curtin, Binglun Yin, Eleanor Yi Kei Mak

A current goal driving alloy development is the identification of alloy compositions for high temperature applications but with the additional requirement of sufficient ductility at ambient temperatures. Multicomponent, single-phase, polycrystalline High E ...

PERGAMON-ELSEVIER SCIENCE LTD2021

High entropy alloys: A focused review of mechanical properties and deformation mechanisms

William Curtin

The high-entropy alloy (HEA) concept was based on the idea that high mixing entropy can promote formation of stable single-phase microstructures. During the past 15 years, various alloy systems have been explored to identify HEA systems with improved prope ...

PERGAMON-ELSEVIER SCIENCE LTD2020

In Situ Deformation Studies of HCP Metal Alloys with Neutron Diffraction, X-Ray Diffraction, and High Resolution Digital Image Correlation

Karl Alan Sofinowski

Mg and Ti alloys are attractive materials for structural applications in the transportation and biomedical industries due to their high strength-to-weight ratios. However, due to their hexagonally close-packed (HCP) lattice structure, they exhibit poor for ...

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

Combining experiments and modeling to explore the solid solution strengthening of high and medium entropy alloys

William Curtin, Céline Varvenne

The mechanical properties due to solid solution strengthening are explored within the single phase face-centered cubic (fcc) domain of the Co-Cr-Fe-Mn Ni high entropy alloy (HEA) system. This is achieved by combining an efficient and reproducible metallurg ...

2019

The mechanics of crack-tip dislocation emission and twinning

Predrag Andric

Dislocation emission from a crack tip is a necessary mechanism for crack tip blunting and toughening. A material is intrinsically ductile under Mode I loading when the critical stress intensity

K_{Ie}

for dislocation emission is lower than the critical s ...

EPFL2019

First-principles-based prediction of yield strength in the RhIrPdPtNiCu high-entropy alloy

William Curtin, Binglun Yin

High-entropy alloys are random alloys with five or more components, often near equi-composition, that often exhibit excellent mechanical properties. Guiding the design of new materials across the wide composition space requires an ability to compute necess ...

2019

Linking electronic structure calculations to generalized stacking fault energies in multicomponent alloys

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Deformation twinning mechanism in magnesium at the microscale: strain rate, temperature and orientation effects

On the scale dependence in the dynamics of frictional rupture: Constant fracture energy versus size-dependent breakdown work

Atomic scale investigations of fracture in metal alloys

A ductility criterion for bcc high entropy alloys

High entropy alloys: A focused review of mechanical properties and deformation mechanisms

In Situ Deformation Studies of HCP Metal Alloys with Neutron Diffraction, X-Ray Diffraction, and High Resolution Digital Image Correlation

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

Combining experiments and modeling to explore the solid solution strengthening of high and medium entropy alloys

The mechanics of crack-tip dislocation emission and twinning

First-principles-based prediction of yield strength in the RhIrPdPtNiCu high-entropy alloy

A ductility criterion for bcc high entropy alloys

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

On the scale dependence in the dynamics of frictional rupture: Constant fracture energy versus size-dependent breakdown work

Combining experiments and modeling to explore the solid solution strengthening of high and medium entropy alloys

Deformation twinning mechanism in magnesium at the microscale: strain rate, temperature and orientation effects

High entropy alloys: A focused review of mechanical properties and deformation mechanisms

In Situ Deformation Studies of HCP Metal Alloys with Neutron Diffraction, X-Ray Diffraction, and High Resolution Digital Image Correlation

The mechanics of crack-tip dislocation emission and twinning

First-principles-based prediction of yield strength in the RhIrPdPtNiCu high-entropy alloy

Atomic scale investigations of fracture in metal alloys