Concept

Martensite

Publications associées (110)

Assessment of irradiation-hardening on Eurofer97' and Zircaloy 2 with punch tests and finite-element modeling

We present an assessment of the mechanical constitutive behavior after irradiation for a tempered martensitic steel, Eurofer97', and for Zircaloy by means of small-ball punch tests. For that purpose we use a finite-element model of the punch test device. W ...

2005

Charpy impact tests on martensitic/ferritic steels after irradiation in SINQ Target-3

Yong Dai

Charpy impact tests were performed on martensitic/ferritic (MF) steels T91, F82H, Optifer-V and Optimax-A/-C irradiated in SINQ Target-3 up to 7.5 dpa and 500 appm He in a temperature range of 120-195 degrees C. Results demonstrate that for all the four ki ...

2005

Assessment of mechanical properties in unirradiated and irradiated zircaloys and steels with non-standard tests and finite element calculations

Emiliano Campitelli

Nuclear materials have been successfully employed in commercial fission reactors for many decades. Research and material development for advanced fission system and future thermo-nuclear fusion reactors have acquired maturity while great challenges remain ...

EPFL2005

On the strain-hardening of tempered martensitic alloys

Philippe Spätig, Raul Alejandro Bonadé

The strain-hardening behaviour of a tempered martensitic iron-chromium-carbon model was examined in terms of dislocation mechanics. Tensile tests of this body-centered cubic alloy were carried out from 77 up to 293 K. A specific relationship between the fl ...

Elsevier2005

Ion implantation in Ni-Ti shape memory alloy thin films

The present thesis focuses on the effect of 5 MeV Ni ion irradiation on the microstructure and the thermomechanical behavior in prestrained (ε∼4%) martensitic Ti-rich NiTi thin films. At this ion energy, damage is limited to a depth of approximately 2 µm ( ...

EPFL2005

Microstructural evolution of Y2O3 and MgAl 2O4 ODS EUROFER steels during their elaboration by mechanical milling and hot isostatic pressing

Cyril Cayron

Different ODS EUROFER steels reinforced with Y2O3 and MgAl2O4 were elaborated by mechanical milling and hot isostatic pressing. Good compromise between strength and ductility could be obtained but the impact properties remain low (especially for the Y 2O3 ...

2004

Plastic flow of martensitic model alloys

Philippe Spätig, Robin Schäublin, Raul Alejandro Bonadé

Modeling of the constitutive behavior was undertaken for Fe- Cr-C tempered martensitic alloys. Tensile tests were carried out at room temperature and constant nominal strain rate. In order to obtain a fully martensitic structure with different prior austen ...

2004

Assessment of the constitutive properties from small ball punch test: experiment and modeling

Philippe Spätig, Raul Alejandro Bonadé, Emiliano Campitelli

An assessment of the true stress-true strain relationship has been done by means of tensile and small ball punch tests on austenitic and tempered martensitic steel at room temperature. A finite element model was developed and validated to calculate the for ...

2004

Mechanical properties and microstructure of a high carbon steel

Iva Tkalcec Vâju

This work is focussed on a high carbon tool steel used for the production of files. The mechanical properties of the files depend on a hardening thermal treatment that produces a martensitic structure. Thus, the motivation for this work is technological: w ...

EPFL2004

Shape memory alloy flexures

Yves Bellouard, Reymond Clavel

Flexures are used in precision engineering where highly accurate, wear-free, smooth and repeatable motion is desired. Flexures are based on deformation of material to achieve a motion between elastically joined parts. They are used in a variety of precisio ...

Elsevier2004

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