Concept

Bainite

Publications associées (98)

Angular distortive matrices of phase transitions in the fcc-bcc-hcp system

This work generalizes the one-step model previously developed on fcc-bcc martensitic transformations to the larger family of phase transitions in the fcc-bcc-hcp system. The angular distortive matrices are calculated for the bcc-fcc, bcc-hcp and fcc-hcp tr ...

Elsevier2016

Comment on "Origin of low-temperature shoulder internal friction peak of Snoek-Koster peak in a medium carbon high alloyed steel" by Lu et al. [Solid State Communications 195 (2014) 31]

Daniele Mari

We want to discuss the interpretation of low-temperature shoulder internal friction peak of Snoek-Koster peak (LTS-SK). Lu et al. (2015) [1] attributed it to the interaction between the carbon atoms and twin boundaries in martensite. Nevertheless, the decr ...

Pergamon-Elsevier Science Ltd2016

On the origin of cementite diffraction peak broadening during tensile deformation at ambient temperatures

Helena Van Swygenhoven, Steven Van Petegem, Michael Andreas Weisser

We report on the diffraction peak shape evolution from cementite particles in three steel microstructures, recorded during in-situ tensile deformation at room temperature. We demonstrate that in a bainitic tempered steel the observed peak broadening and as ...

Pergamon-Elsevier Science Ltd2015

Microstructural influence on the scatter in the fatigue life of steel reinforcement bars

Alain Nussbaumer, Marina Rocha Pinto Portela Nunes

Fatigue damage accumulation and failure of steel reinforcement bars (rebars) is a stochastic process. Scatter can be influenced by the sensitivity of the short crack growth to the microstructural features, especially near the fatigue limit. This work inves ...

Elsevier2015

Evaluation of dislocation density and interstitial carbon content in quenched and tempered steel by internal friction

Daniele Mari

In this work, mechanical spectroscopy (internal friction) is used for a qualitative evaluation of interstitial carbon content in martensite and of the dislocation density in bulk samples of quenched and tempered steel. On one hand, the decrease of the ampl ...

Elsevier Science Sa2015

Comparative study and quantification of cementite decomposition in heavily drawn pearlitic steel wires

Daniele Mari, Aude Marie Agnès Lamontagne

Heavily cold-drawing was performed on a pearlitic steel wire and on an ultra-low carbon (ULC) steel wire in order to highlight and quantify the microstructural changes caused by this type of deformation. Both global techniques (thermoelectric power, electr ...

Elsevier Science Sa2015

Thermal and damping behaviour of magnetic shape memory alloy composites

Véronique Michaud, Susanne Glock

Single crystals of ferromagnetic shape memory alloys (MSMA) exhibit magnetic field and stress induced strains via energy dissipating twinning. Embedding single crystalline MSMA particles into a polymer matrix could thus produce composites with enhanced ene ...

2015

Fatigue behaviour prediction of steel reinforcement bars using an adapted Navarro and De Los Rios model

Alain Nussbaumer, Marina Rocha Pinto Portela Nunes

Fatigue cracks tend to initiate on the rebar surface and therefore, the surface conditions may control their fatigue behaviour. This study investigates the influence of surface microstructure and roughness dispersion on the scatter and fatigue life of hot ...

Elsevier Sci Ltd2015

Phase transitions associated with competing order parameters in compressively strained SrTiO3 thin films

Alexander Tagantsev, Harry Joseph Trodahl

(100)-epitaxial SrTiO3 thin films having biaxial compressive strains up to -1.60% were grown on lattice mismatched substrates. Two phase transitions induced by the coupled instabilities (antiferrodistortive and ferroelectric) in SrTiO3 were revealed in a c ...

Amer Physical Soc2015

UV-Imprint Resists Generated from Polymerizable Ionic Liquids and Titania Nanoparticles

Paul Joseph Dyson, Jürgen Brugger, Zhaofu Fei, Emilia Paunescu, Vaida Auzelyte, Aswin Gopakumar

Ionic liquids incorporating a polymerizable anion were prepared in a facile manner and used to fabricate stable titania nanoparticle films. The nanotitania was directly patterned by UV imprinting using micrometer size test structures in a polydimethylsilox ...

Amer Chemical Soc2014

Graph Chatbot

Chattez avec Graph Search

Posez n’importe quelle question sur les cours, conférences, exercices, recherches, actualités, etc. de l’EPFL ou essayez les exemples de questions ci-dessous.

AVERTISSEMENT : Le chatbot Graph n'est pas programmé pour fournir des réponses explicites ou catégoriques à vos questions. Il transforme plutôt vos questions en demandes API qui sont distribuées aux différents services informatiques officiellement administrés par l'EPFL. Son but est uniquement de collecter et de recommander des références pertinentes à des contenus que vous pouvez explorer pour vous aider à répondre à vos questions.

Connectez-vous pour utiliser Chat avec Graph Search