In-situ mechanical testing during x-ray powder diffraction
In 2003 a miniaturized device has been developed to perform in-situ mechanical testing at the powder diffraction station of the Materials Science beam line at the Swiss Light Source (SLS). It allows deforming polycrystalline samples with sizes of the order of a few millimetres while continuously recording diffraction patterns. Detailed information on the setup can be found in Review of Scientific Instruments 77 (2006) 013902 http://dx.doi.org/10.1063/1.2162453.
The miniaturized tensile machine mounted at the powder diffraction station of the Materials Science beam line (SLS)
Most of the research has focussed on the study of deformation mechanisms in nanocrystalline metals. It could be shown, amoung others, that in nanocrystalline Ni with a grain size of 26nm no permanent dislocation network is built-up during plastic deformation, in contrast to what is typically observed for coarse grained fcc metals. Furthermore it has been established that multiple deformation mechanisms are operative simultaneously.
Other applications for this method are:
- the study of load transfer in nano-composites
- kinetics of the martensitic phase transformation in an fine-grained austenitic steel
- development of inter-granular strain during plastic deformation
Within the framework of the ERC advanced grant MULTIAX a miniaturized biaxial deformation rig was developed at PSI to perform in-situ mechanical testing while applying multiaxial stresses on cruciform shaped specimens. Detailed information on the setup can found in Experimental Mechanics 57, 569-580 (2017). DOI: 10.1007/s11340-016-0244-0 and on the ERC MULTIAX website.
Biaxial deformation rig
Main publicationsA Miniaturized Biaxial Deformation Rig for in Situ Mechanical Testing
Van Petegem S, Guitton A, Dupraz M, Bollhalder A, Sofinowski K, Upadhyay M V, Van Swygenhoven H
Experimental Mechanics 57, 569-580 (2017).
Deformation behavior of nano-porous polycrystalline silver. Part II: Simulations
Zabihzadeh S, Cugnoni J, Duarte L I, Van Petegem S, Van Swygenhoven H
Acta Materialia 131, 564-573 (2017).
Deformation behavior of nanoporous polycrystalline silver. Part I: Microstructure and mechanical properties
Zabihzadeh S, Van Petegem S, Holler M, Diaz A, Duarte LI, Van Swygenhoven H
Acta Materialia 131, 467 (2017).
Grain size and alloying effects on dynamic recovery in nanocrystalline metals
Sun Z, Van Petegem S, Cervellino A, Blum W, Van Swygenhoven H
Acta Materialia 119, 104-114 (2016).
Deformation behavior of sintered nanocrystalline silver layers
Zabihzadeh S, Van Petegem S, Duarte L I, Mokso R, Cervellino A, Van Swygenhoven H
Acta Materialia 97, 116-123 (2015).
Dynamic recovery in nanocrystalline Ni
Z. Sun, S. Van Petegem, A. Cervellino et al.
Acta Materialia 91, 91 (2015).
On the origin of cementite diffraction peak broadening during tensile deformation at ambient temperatures
M.A. Weisser, S. Van Petegem, A. Cervellino et al.
International Journal of Plasticity 66, 138 (2015).
In-situ mechanical testing during X-ray diffraction
Helena Van Swygenhoven, Steven Van Petegem
Materials Characterization 78, 47 (2013).
Slip-induced intergranular stress redistribution in nanocrystalline Ni
L Li, S Van Petegem, H Van Swygenhoven, PM Anderson
Acta Materialia 60, 7001 (2012).
Two strain-hardening mechanisms in nanocrystalline austenitic steel: An in situ synchrotron X-ray diffraction study
P Schloth, MA Weisser, H Van Swygenhoven, S Van Petegem, P Susila, VS Sarma, BS Murty, S Lauterbach, M Heilmaier
Scripta Materialia 66, 690 (2012).
Yield point phenomenon during strain rate change in nanocrystalline Ni-Fe
S Van Petegem, J Zimmermann, H Van Swygenhoven
Scripta Materialia 65, 217 (2011).
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).
On the microstructure of nanoporous gold: an x-ray diffraction study
S. Van Petegem, S. Brandstetter, R. Maaß, A.M. Hodge, B.S. El-Dasher, J. Biener, B. Schmitt, C. Borca, H. Van Swygenhoven
Nanoletters 9, 1158 (2009)
Creep in nanocrystalline Ni during x-ray diffraction
S. Van Petegem, S. Brandstetter, B. Schmitt, R. Maass, H. Van Swygenhoven
Scripta Materialia 60, 29 (2009)
A new criterion for elasto-plastic transition in nanomaterials: Application to size and composite effects on Cu-Nb nanocomposite wires
L. Thilly, S. Van Petegem, P.-O. Renault, F. Lecouturier, V. Vidal, B. Schmitt, H. Van Swygenhoven
Acta Materialia 57, 3157 (2009)
Evidence of internal Bauschinger test in nanocomposite wires during in situ macroscopic tensile cycling under synchrotron beam
L. Thilly, S. Van Petegem, P.O. Renault, V. Vidal, F. Lecouturier, S. Brandstetter, B. Schmitt, H. Van Swygenhoven
Applied Physics Letters 90, 241907 (2007)
From Micro- to Macroplasticity
S. Brandstetter, H. Van Swygenhoven,S. Van Petegem, B. Schmitt, R. Maass, P.M. Derlet
Advanced Materials 18, 1545 (2006)
Following peak profiles during elastic and plastic deformation: A synchrotron-based technique
H. Van Swygenhoven, B. Schmitt, P. M. Derlet, S. Van Petegem, A. Cervellino, Z. Budrovic, S. Brandstetter, A. Bollhalder, and M. Schild
Review of Scientific Instruments 77, 013902 (2006)
Footprints of deformation mechanisms during in-situ X-ray diffraction: nanocrystalline and ultra-fine grained Ni
Z. Budrovic, S. Van Petegem, P.M. Derlet, B. Schmitt, H. Van Swygenhoven, E. Schafler, M. Zehetbauer
Applied Physics Letters 86, 231910 (2005)
Temperature-dependent residual broadening of x-ray diffraction spectra in nanocrystalline plasticity
S. Brandstetter, Z. Budrovic, S. Van Petegem, B. Schmitt, E. Stergar, P. M. Derlet, and H. Van Swygenhoven
Applied Physics Letters 87, 231910 (2005)
Plastic deformation with reversible peak broadening in nanocrystalline Ni.
Z. Budrovic, H.Van Swygenhoven, P.M.Derlet, S. Van Petegem, Bernd Schmitt.
Science 304, 273 (2004)