Journal ArticleDOI
Time-of-flight diffraction with multiple frame overlap Part II: The strain scanner POLDI at PSI
Uwe Stuhr,H. Spitzer,J. Egger,A. Hofer,P. Rasmussen,Dieter Graf,A. Bollhalder,M. Schild,G.S. Bauer,Wolfgang Wagner +9 more
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TLDR
The POLDI (Pulse-OverLap DIffractometer) is a multiple pulse-overlap diffractometer at PSI, which is designed mainly for strain-scanning experiments.Abstract:
POLDI (Pulse-OverLap DIffractometer) is a multiple pulse-overlap diffractometer at PSI, which is designed mainly for strain-scanning experiments. The multiple pulse-overlap method made it possible to build a time-of-flight diffractometer at a continuous neutron source with short flight path, high resolution and high intensity. The best achievable resolutions for the relative linewidths of the Bragg reflections are between 1×10−3 and 2×10−3, depending on the lattice spacing. The layout of the instrument and the features of the chopper, the neutron mirror and the 3He detector in time-focusing geometry are presented. The overall performance of the instrument is discussed with examples of strain-field measurements.read more
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Journal ArticleDOI
Mapping residual and internal stress in materials by neutron diffraction
TL;DR: Withers et al. as mentioned in this paper reviewed the basic scientific methodology by which internal strains and stresses are inferred from recorded diffraction peaks and compared their complementarity with analogous synchrotron X-ray methods.
Journal ArticleDOI
In-situ neutron diffraction during biaxial deformation
S. Van Petegem,J. N. Wagner,Tobias Panzner,M. V. Upadhyay,T. T. T. Trang,T. T. T. Trang,H. Van Swygenhoven,H. Van Swygenhoven +7 more
TL;DR: In this article, a multiaxial deformation rig that allows performing in situ proportional and non-proportional loading under neutron diffraction was presented for the case of a 316 L stainless steel.
Journal ArticleDOI
New concepts for neutron instrumentation
TL;DR: In this article, the phase space of neutrons can be adapted to match the needs of neutron beam lines and how to transport the neutrons efficiently from the moderator to the sample and detector.
Journal ArticleDOI
Plasticity of multiscale nanofilamentary Cu/Nb composite wires during in situ neutron diffraction: Codeformation and size effect
Ludovic Thilly,Pierre-Olivier Renault,Vanessa Vidal,Florence Lecouturier,S. Van Petegem,Uwe Stuhr,H. Van Swygenhoven +6 more
TL;DR: In situ neutron diffraction was performed on Cu∕Nb nanocomposite wires composed of a multiscale Cu matrix embedding Nb nanofilaments with a diameter of 267nm and spacing of 45nm as mentioned in this paper.
Journal ArticleDOI
Effect of microstructure on mechanical properties and residual stresses in interpenetrating aluminum-alumina composites fabricated by squeeze casting
Justyna Maj,Michał Basista,Witold Węglewski,Kamil Bochenek,Agata Strojny-Nędza,Krzysztof Naplocha,Tobias Panzner,Monika Tatarková,Francesco Fiori +8 more
TL;DR: In this article, the influence of interpenetrating microstructure on the macroscopic bending strength, fracture toughness, hardness and heat conduction of aluminum-alumina composites is examined.
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