Publications de Raul Alejandro Bonadé

Fracture toughness master-curve analysis of the tempered martensitic steel Eurofer97

Philippe Spätig, Raul Alejandro Bonadé, Pablo Federico Mueller

We report fracture toughness data for the reduced activation tempered martensitic steel Eurofer97 in the lower to middle transition region. The fracture toughness was measured from tests carried out on 0.35T and 0.87T pre-cracked compact tension specimens. ...

Elsevier2009

Fracture properties of notched and pre-cracked specimens of a tempered martensitic steel at low temperature

Philippe Spätig, Raul Alejandro Bonadé, Pablo Federico Mueller

The fracture properties of the 9CrWVTa reduced-activation tempered martensitic steel Eurofer97 were studied in the lower ductile to brittle transition. Sub-sized pre-cracked compact tension and notched tensile specimens were tested. Finite element simulati ...

2008

Fracture toughness behavior in the ductile-brittle transition region of the tempered martensitic Eurofer97 steel: Experiments and modeling

Philippe Spätig, Raul Alejandro Bonadé, Pablo Federico Mueller

The fracture toughness of the tempered martensitic stainless steel Eurofer97 has been experimentally characterized in the ductile-to-brittle transition (DBT) region with sub-sized compact tension specimens. The median fracture toughness–temperature curve i ...

Elsevier2008

The evolution of the mobile dislocation density during successive stress relaxation transients

Philippe Spätig, Raul Alejandro Bonadé

The successive stress-relaxation (SSR) experiment is a well- known technique that is mainly used to study different aspects of the plastic deformation phenomena. The technique has been described extensively elsewhere [L.P. Kubin, Philos. Mag. 30 (1974) 705 ...

Elsevier2008

Plastic flow properties and fracture toughness characterization of unirradiated and irradiated tempered martensitic steels

Philippe Spätig, Raul Alejandro Bonadé, Emiliano Campitelli, Pablo Federico Mueller

We investigate the plastic flow properties at low and high temperature of the tempered martensitic steel Eurofer97. We show that below room temperature, where the Peierls friction on the screw dislocation is active, it is necessary to modify the usual Tayl ...

2007

Fracture toughness properties in the transition region of the Eurofer97 tempered martensitic steel

Nadine Baluc, Philippe Spätig, Raul Alejandro Bonadé

A fracture toughness database obtained on the Eurofer97 steel (25 mm plate, heat 83697) is presented. The material has been tested in the 'as-received' condition in the lower transition region at temperatures ranging from 173 K down to 123 K. Sub-sized (0. ...

2007

Constitutive behavior and fracture properties of tempered martensitic steels for nuclear applications : experiments and modelling

Raul Alejandro Bonadé

In this study, the tensile and fracture properties and the microstructure of the reduced-activation tempered martensitic steel Eurofer97 have been investigated. This technical alloy is a 9%Cr steel developed within the European fusion material research pro ...

EPFL2006

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

Assessment of plastic flow and fracture properties with small specimen test techniques for IFMIF-designed specimens

Nadine Baluc, Philippe Spätig, Raul Alejandro Bonadé, Emiliano Campitelli

The primary mission of the international fusion material irradiation facility (IFMIF) is to generate a material database to be used for the design of various components, for the licensing and for the assessment of the safe operation of a demonstration fusi ...

IOP Publishing Ltd2005