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Steven Van Petegem

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Publications associées (32)

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A Miniaturized Biaxial Deformation Rig for in Situ Mechanical Testing

Helena Van Swygenhoven, Steven Van Petegem

A novel miniaturized biaxial deformation rig is presented. It allows one to apply in-plane biaxial stress states with arbitrary stress ratios and to perform strain path changes on thin-sheet metals. The device is optimized for in situ usage inside a scanni ...

Springer2017

Laue microdiffraction characterisation of as-cast and tensile deformed Al microwires

Andreas Mortensen, Steven Van Petegem, Helena Van Swygenhoven, Léa Deillon, Suzanne Godelieve Alphonsine Verheyden

Single-crystalline cast aluminium microwires with a diameter near 15 are characterised by Laue microdiffraction. A microwire in the as-cast condition exhibits a misorientation below over a length of 500 . The measured density of geometrically necessary dis ...

TAYLOR & FRANCIS LTD2019

Deformation behavior of nano-porous polycrystalline silver. Part II: Simulations

Joël Cugnoni, Helena Van Swygenhoven, Steven Van Petegem

Three-dimensional finite element simulations of nano-porous silver structures are performed to understand the correlation between the porous morphology and the mechanical behavior. The nano structures have been obtained from ptychographic X-ray computed to ...

Elsevier2017

Deformation and degradation of superelastic NiTi under multiaxial loading

Steven Van Petegem, Helena Van Swygenhoven, Nicola Casati, Wei-Neng Hsu

The degradation of the superelastic properties of a commercial NiTi alloy is studied during uniaxial, biaxial and load-path-change cycling performed in-situ with synchrotron X-ray diffraction. Careful examination of the diffraction pattern during uniaxial ...

2019

In situ tension-tension strain path changes of cold-rolled Mg AZ31B

Steven Van Petegem, Helena Van Swygenhoven

The mechanical behavior of cold-rolled Mg AZ31B is studied during in-plane multiaxial loading and tension-tension strain path changes performed on cruciform samples using in situ neutron diffraction and EBSD. The results are compared with uniaxial tension ...

2019

Grain size and alloying effects on dynamic recovery in nanocrystalline metals

Helena Van Swygenhoven, Steven Van Petegem

Dynamic recovery in nanocrystalline Ni and Ni50Fe50 with respective grain sizes of 65 rim and 15 nm is studied using stress reduction tests during in situ X-ray diffraction. The results are compared with a previous study on NC Ni with 35 nm grain size. Def ...

Pergamon-Elsevier Science Ltd2016

Slip in directionally solidified Mo-alloy micropillars-Part II: Pillars containing defects

Helena Van Swygenhoven, Steven Van Petegem

In situ Laue analysis during microcompression is carried out on Mo-alloy pillars containing defects due to focused ion beam milling or pre-strain. Independently of how the defects are introduced, if the diffraction peaks are streaked prior to deformation, ...

2012

The use of Laue microdiffraction to study small-scale plasticity

Steven Van Petegem, Helena Van Swygenhoven

Micromechanics is a booming research area experiencing the development of new advanced testing methods at small dimensions A relatively young but very popular technique involves uniaxial compressing micrometer and sub-micrometer sized objects, usually in t ...

Springer, Springer US2010

Slip in directionally solidified Mo-alloy micropillars - Part I: Nominally dislocation-free pillars

Cécile Hébert, Emad Oveisi, Steven Van Petegem, Helena Van Swygenhoven, Barbora Bártová, Cécile Renée Maria Marichal

In situ Laue analysis during microcompression reveals plasticity in [0 0 1]-oriented, directionally solidified Mo alloy pillars to start with slip on the {1 1 2} < 1 1 1 > system having the highest Schmid factor followed by slip on the (1 1 0) plane contai ...

Elsevier2012

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

Defect structure in micropillars using X-ray microdiffraction

Martinus Adela Maria Gijs, Helena Van Swygenhoven, Thomas Lehnert, Steven Van Petegem

AIP American Institute of Physics2006