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Philippe Spätig

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Publications associées (43)

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W-2 wt.%Y2O3 composite: Microstructure and mechanical properties

Nadine Baluc, Philippe Spätig, Robin Schäublin

A W-2Y(2)O(3) composite is produced by powder metallurgy, including the pressing of the mixed elemental powders, their sintering and hot forging. The microstructure of the obtained composite is investigated using light microscopy, scanning electron microsc ...

2012

Analytical determination of the constitutive behavior from micro-pillar testing: Application to a tempered martensitic steel

Philippe Spätig, Hans-Peter Seifert, Nazar Ilchuk

Micro-compression experiments were carried out on micro-pillars, with nominal diameter of 10 mu m and height 20 mu m, and fabricated from a high-chromium tempered martensitic steels developed for nuclear applications. An analytical method was proposed to c ...

2014

Effect of thermo-mechanical treatments on the microstructure and mechanical properties of an ODS ferritic steel

Nadine Baluc, Philippe Spätig

The Fe-14Cr-2W-0.3Ti-0.3Y(2)O(3) oxide dispersion strengthened (ODS) reduced activation ferritic (RAF) steel was fabricated by mechanical alloying of a pre-alloyed, gas atomised powder with yttria nano-particles, followed by hot isostatic pressing and ther ...

Elsevier2011

Microstructure and mechanical properties of a W-2wt.%Y2O3 composite produced by sintering and hot forging

Nadine Baluc, Philippe Spätig, Robin Schäublin

A W-2Y(2)O(3) composite has been developed by powder metallurgy methods in collaboration with the Plansee Company (Austria). The microstructure of the composite was analyzed using transmission electron microscopy and electron backscatter diffraction in sca ...

2013

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

The role of small specimen test technology in fusion materials development

Philippe Spätig, Guillaume Lucas

Small specimen test technology (SSTT) has long been an integral part of fusion materials development. Past work has led to an array of techniques that not only have provided a means of efficiently using available irradiation volumes but have also led to im ...

2007

Microstructure and tensile properties of ODS ferritic steels mechanically alloyed with Fe 2 Y

Nadine Baluc, Philippe Spätig

An oxide dispersion strengthened ODS ferritic steel has been produced by mechanical alloying of Fe–14Cr–2W–0.2Ti (wt.%) prealloyed powder with 0.55 (wt.%) Fe2Y intermetallic particles and consolidated by hot isostatic pressing. The microstructure after the ...

Elsevier2016

Mechanical behaviour of nanocrystalline electrodeposited Ni above room temperature

Philippe Spätig, Helena Van Swygenhoven, Robin Schäublin, Florian Dalla Torre

Tensile properties and microstructure of Danocrystalline electrodeposited Ni at temperatures between room temperature and 330&DEG; C are presented. Above 300&DEG; C low flow stress and high tensile elongation are observed along with grain growth and segreg ...

2005

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

Philippe Spätig, Raul Alejandro Bonadé

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

Dislocation defect interaction in irradiated Cu

Philippe Spätig, Robin Schäublin, Zhongwen Yao

Pure Cu single crystals irradiated at room temperature to low doses with 590MeV protons have been deformed in situ in a transmission electron microscope in order to identify the basic mechanisms at the origin of hardening. Cu irradiated to 10(-4) dpa shows ...

2005

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

Philippe Spätig, Raul Alejandro Bonadé

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

Investigation of microstructure and microhardness of pure W and W-2Y(2)O(3) materials before and after ion-irradiation

Nadine Baluc, Philippe Spätig

Pure W and W-2Y(2)O(3) materials were fabricated using powder metallurgy method. The microstructures of the materials were investigated by electron back-scattered diffraction and transmission electron microscopy techniques. Both materials contain 1-2 mu m ...

2014

The European effort towards the development of a demo structural material: Irradiation behaviour of the European reference RAFM steel EUROFER

Philippe Spätig

Worldwide programs aimed at developing materials for future fusion plants are presently concentrating on reduced activation ferritic/martensitic (RAFM) steels. In Europe, a Fusion Long Term Programme is being carried out under the coordination of European ...

2006

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

Philippe Spätig, Raul Alejandro Bonadé

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

Role of mean stress on fatigue behavior of a 316L austenitic stainless steel in LWR and air environments

Philippe Spätig, Hans-Peter Seifert

Mean stress effects on fatigue life of a stainless steel in air and boiling water reactor (BWR) environments were evaluated by load-controlled tests. In stress-life, non-zero mean stresses increase life in low cycle fatigue regime in both environments and ...

ELSEVIER SCI LTD2021

Measurement of residual stresses around the notch of tensile specimens of the high-Cr tempered martensitic steel F82H-mod

Philippe Spätig, Steven Van Petegem, Nazar Ilchuk

Residual elastic strains were measured by neutron diffraction using POLDI facility at PSI-Switzerland on pre-loaded notched flat tensile specimens made of the high-chromium tempered martensitic steel F82H-mod steel. To calculate the residual stresses using ...

2014

Measurement of residual stresses around the notch of tensile specimens of the high-Cr tempered martensitic steel F82H-mod

Philippe Spätig, Steven Van Petegem, Nazar Ilchuk

Residual elastic strains were measured by neutron diffraction using POLDI materials science diffractometer at PSI-Switzerland on pre-loaded notched flat tensile specimens made of the high-chromium tempered martensitic steel F82H-mod steel. To calculate the ...

Trans Tech Publications Ltd2014

Effect of dynamic strain ageing on environmental degradation of fracture resistance of low-alloy RPV steels in high-temperature water environments

Philippe Spätig, Hans-Peter Seifert, Zaiqing Que

Elastic plastic fracture mechanics tests on different low-alloy reactor pressure vessel (RPV) steels in air and various simulated light water reactor environments revealed a clear, but moderate reduction of the fracture initiation resistance of RPV steels ...

2019

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

Numerical investigation by finite element simulations of the ball punch test: Application to tempered martensitic steels

Philippe Spätig, Emiliano Campitelli

The effects of the post-yield behaviour on the shape of small ball punch test (SBPT) curves were investigated with finite element simulations from which the load-deflection curves were extracted. We have shown the general yield load defined on the ball pun ...

Elsevier2009