Publication
One-step model of the face-centred-cubic to body-centred-cubic martensitic transformation
Publications associées (68)
Study on Bainite/Martensite Transformation in Reheated Weld Metals
Roland Logé, Cyril Cayron, Gaojun Mao, Rui Cao
A new combination of laser scanning confocal microscope (LSCM) and electron backscattering diffraction (EBSD) with a field-emission scanning electron microscope (SEM) is utilized to study the mechanism of bainite transformation in reheated low carbon baini ...
TRANS TECH PUBLICATIONS LTD2018Microstructural evolution and mechanical property development with nickel addition in low-carbon weld butt joints
Roland Logé, Cyril Cayron, Gaojun Mao, Rui Cao
Four metal powder flux-cored wires with added nickel (Ni) were designed to systematically investigate how Ni influences the microstructure and toughness in low-carbon bainitic weld metals (WMs). The microstructure was safely predicted by utilizing reasonab ...
2018Characterization of the deformation and phase transformation behavior of VC-free and VC-containing FeMnSi-based shape memory alloys by in situ neutron diffraction
Helena Van Swygenhoven, Steven Van Petegem, Christian Leinenbach
The stress-induced fcc-austenite to hcp-martensite transformation in the iron based shape memory alloy (SMA) Fe-17Mn-5Si-10Cr-4Ni with and without VC precipitates is investigated by in-situ neutron diffraction measurements upon uniaxial loading and unloadi ...
Elsevier Science Sa2017The austenite/lath martensite interface in steels: Structure, athermal motion, and in-situ transformation strain revealed by simulation and theory
William Curtin, Francesco Maresca
The austenite/martensite (fcc/bcc) interface is prevalent across many new classes of high-strength steels, and yet both its fundamental structure and its mechanism of motion remain uncertain in spite of decades of research. Here, atomistic simulations are ...
2017Variant selection in surface martensite
Roland Logé, Cyril Cayron, Annick Pauline Baur
A significant variant selection is reported in isothermal martensite formed on the surface of an Fe-30% Ni sample. The selection phenomenon is modelled using different descriptions of the martensitic phase transformation. In particular, matrices based on t ...
International Union of Crystallography2017{225} habit planes in martensitic steels: from the PTMC to a continuous model
Roland Logé, Cyril Cayron, Annick Pauline Baur
Fine twinned microstructures with {225}γ habit planes are commonly observed in martensitic steels. The present study shows that an equibalanced combination of twin-related variants associated to the Kurdjumov-Sachs orientation relationship is equivalent to ...
Nature Publishing Group2017Reversible patterning of spherical shells through constrained buckling
Pedro Miguel Nunes Pereira de Almeida Reis, Pierre-Thomas Paul Brun
Recent advances in active soft structures envision the large deformations resulting from mechanical instabilities as routes for functional shape morphing. Numerous such examples exist for filamentary and plate systems. However, examples with double-curved ...
2017On 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 Ltd2015Evaluation of dislocation density and interstitial carbon content in quenched and tempered steel by internal friction
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 Sa2015Continuous atomic displacements and lattice distortion during fcc–bcc martensitic transformation
The continuous matrices of atomic displacements and lattice distortion from face-centered-cubic (fcc) to body-centered-cubic (bcc) phases compatible with the hard-sphere geometry of iron atoms are calculated for different possible final orientation relatio ...
Elsevier2015