Concept

Martensite

Publications associées (110)

The effect of processing parameters on the dynamic recrystallisation behaviour of API-X70 pipeline steel

The effect of deformation temperature and strain rate on the dynamic recrystallisation (DRX) behaviour of X70 pipeline steel was investigated. DRX parameters such as the critical and peak stresses and strains as well as the deformation activation energy we ...

2013

Influence of quench rate and microstructure on bendability of AA6016 aluminum alloys

Andreas Mortensen, Andreas Rossoll, Frédéric Diologent, Jean-François Despois, Cyrille Bezençon

The influence of the quench rate after solution treatment on the bendability of AA6016 aluminum alloy sheets was investigated. Crack initiation during bending tests is found to be independent of quench rate whereas crack propagation is decreased after rapi ...

Elsevier2013

INTERNAL STRESS GENERATION DURING QUENCHING OF THICK HEAT TREATABLE ALUMINIUM ALLOYS

Jean-Marie Drezet, Helena Van Swygenhoven, Nicolas Paul Henry Chobaut, Patrick Schloth

In the current trend toward thicker aluminium plates, a major concern is the stress build-up during quenching which causes distortions during machining. Indeed, cooling rates are not high enough, especially at the core of such thick plates, to prevent any ...

TMS2013

One-step model of the face-centred-cubic to body-centred-cubic martensitic transformation

Cyril Cayron

A 'one-step' theory based on Pitsch distortion is proposed to explain the continuity between the orientations of the Kurdjumov-Sachs (KS), Nishiyama-Wassermann (NW) and Pitsch variants observed on the electron backscatter diffraction pole figures of marten ...

2013

On determination of the constitutive behavior of tempered martensitic steels from micro-indentations: Application to Eurofer97 steel

Philippe Spätig, Nazar Ilchuk

This paper proposes a simple but powerful approach to determine the constitutive equation of tempered martensitic steels from micro-hardness tests. Finite element simulations were used to investigate the plastic flow in the contact region between the tip a ...

Elsevier Science Bv2013

Two strain-hardening mechanisms in nanocrystalline austenitic steel: An in situ synchrotron X-ray diffraction study

Helena Van Swygenhoven, Steven Van Petegem, Patrick Schloth, Michael Andreas Weisser

The mechanical behaviour of nanocrystalline austenitic steels with and without yttria particles was investigated using in situ synchrotron diffraction during tensile deformation. Two different strain-hardening regimes were found. The first regime can be as ...

2012

Microstructure of single crystal Ni-based superalloys during blade manufacturing process and creep deformation

Stéphane Pierret

The aim of the thesis is to obtain more understanding about the influence of plastic deformation on the microstructural changes observed in single crystal (SX) Ni-based superalloys using diffraction techniques. This work was organised around two main probl ...

EPFL2012

Crystallographic analysis of martensite in 0.2C-2.0Mn-1.5Si-0.6Cr steel by EBSD

Cyril Cayron

The crystallography of martensite formed in 0.2C-2.0Mn-1.5Si-0.6Cr steel was studied using the EBSD technique. The results showed that the observed orientation relationship was closer to the Nishiyama- Wassermann (N-W) than to the Kurdjumov-Sachs (K-S) ori ...

2011

Crystallographic analysis of martensite in 0.2C-2.0Mn-1.5Si-0.6Cr steel using EBSD

Cyril Cayron

The crystallography of martensite formed in 0.2C-2.0Mn-1.5Si-0.6Cr steel was studied using the electron backscattered diffraction (EBSD) technique. The results showed that the observed orientation relationship (OR) was closer to that of Nishiyama-Wasserman ...

2011

New theory of fcc-bcc martensitic transformations in steels

Cyril Cayron

A new theory is introduced as an alternative to the phenomenological theory of martensitic transformations. This theory is based on experimental EBSD maps treated with a new software for automatic reconstruction of parent grains. © 2011 EDP Sciences. ...

2011

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