In-situ neutron diffraction of engineering materials
Uniaxial deformation is the most widely used mechanical test procedure for metals. For this purpose at POLDI there is a 30kN deformation rig which can be used for tensile/compression/low cycle fatigue experiments.
Many applications of metals involve complex strain paths, calling for devices that can apply multiaxial loading conditions. At POLDI a new multi-axial deformation rig (Zwick Roell) has been recently installed (Acta Materialia 105 (2016) 404-416). It allows performing in-situ in-plane biaxial loading along two orthogonal axes or combining uni-axial tensile/compressive deformation with torsion.
Main publicationsStresses and Strains in Cruciform Samples Deformed in Tension
Upadhyay M V, Panzner T, Van Petegem S, Van Swygenhoven H
Experimental Mechanics 57, 905-920 (2017).
In-situ neutron diffraction during biaxial deformation
Van Petegem S, Wagner J, Panzner T, Upadhyay M V, Trang T T T, Van Swygenhoven H
Acta Materialia *10*5, 404-416 (2016).
Study of lattice strain evolution during biaxial deformation of stainless steel using a finite element and fast Fourier transform based multi-scale approach
Upadhyay MV, Van Petegem S, Panzner T, Lebensohn RA, Van Swygenhoven H
Acta Materialia 118, 28 (2016).
Complex investigation of deformation twinning in gamma-TiAl by TEM and neutron diffraction
Beran P, Heczko M, Kruml T, Panzner T, Van Petegem S
Journal of the Mechanics and Physics of Solids 95, 647 (2016).
On the origin of cementite diffraction peak broadening during tensile deformation at ambient temperatures
Weisser M A, Van Petegem S, Cervellino A, Van Swygenhoven H
International Journal of Plasticity 66, 138-144 (2015).
In-situ biaxial mechanical testing at the neutron time-of-flight diffractometer POLDI
Repper Julia, Niffenegger Markus, Van Petegem Steven, Wagner Werner, Van Swygenhoven Helena
Internation Conference on Residual Stresses 9 (ICRS 9) 768-769, 60-65 (2014).
Effect of microstructure anisotropy on the deformation of MAX polycrystals studied by in-situ compression combined with neutron diffraction Guitton
A, Van Petegem S, Tromas C, Joulain A, Van Swygenhoven H, Thilly L
Applied Physics Letters 104, 241910 (2014).
Origin of localized rafting in Ni-based single crystal turbine blades before service and its influence on the mechanical properties
Pierret S, Etter T, Evans A, Van Swygenhoven H
Acta Materialia 61, 1478-1488 (2013).
Neutron and X-ray diffraction study of residual and internal stress evolution in pearlitic steel during cold drawing
M Kriska, J Tacq, K Van Acker, M Seefeldt, S Van Petegem
5th European Conference on Neutron Scattering 340, 012101 (2012).
In situ room temperature tensile deformation of a 1% CrMoV bainitic steel using synchrotron and neutron diffraction
MA Weisser, AD Evans, S Van Petegem, SR Holdsworth, H Van Swygenhoven
Acta Materialia 59, 4448 (2011).
Plasticity of nanostructured Cu-Nb-based wires: Strengthening mechanisms revealed by in situ deformation under neutrons
V Vidal, L Thilly, S Van Petegem, U Stuhr, F Lecouturier, PO Renault, H Van Swygenhoven
Scripta Materialia 60, 171 (2009).
POLDI: Materials Science and Engineering Instrument at SINQ
A Evans, S Van Petegem, H Van Swygenhoven
Neutron News 20 (3), 17 (2009).
In situ Neutron Diffraction Study of Internal Micro-Stresses Developed by Plastic Elongation in < 110 > Textured BCC Wires
JG Sevillano, J Alkorta, D Gonzalez, S Van Petegem, U Stuhr, H Van Swygenhoven
Advanced Engineering Materialis 10, 951 (2008).
Plasticity of multiscale nanofilamentary Cu/Nb composite wires during in situ neutron diffraction: Codeformation and size effect.
V. Vidal, L. Thilly, S. Van Petegem, U. Stuhr, F. Lecouturier, P. O. Renault, and H. Van Swygenhoven.
Applied Physics Letters 88, 191906 (2006)