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  • 1
    Electronic Resource
    Electronic Resource
    The Use of High-Energy Synchrotron Diffraction for Residual Stress Analyses (1999)
    Springer
    Journal of materials science 18 (1999), S. 581-583 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006651217517
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Processing of X-ray diffraction imaging data using remote sensing techniques (2000)
    Springer
    Journal of materials science 19 (2000), S. 975-977 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006724406926
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Methods and Feasibility of Residual Stress Analysis by High-Energy Synchrotron Radiation in Transmission Geometry Using a White Beam (2000)
    Springer
    Journal of nondestructive evaluation 19 (2000), S. 21-31 
    Details
    ISSN: 1573-4862
    Keywords: residual stresses ; high-energy synchrotron radiation ; components ; texture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract White high-energy synchrotron radiation has recently been introduced as a new tool for the analysis of the triaxial residual stress state in the bulk of metals, ceramics, and composite materials. First, the set-up of an experiment is presented. Then, based upon theoretical considerations and experimental data, the parameters of the setup and the possibilities as well as limits of residual stress analysis by white high-energy synchrotron radiation are discussed. The resolution in energy as well as the spatial resolution achievable are shown and the implications of the material investigated such as coarse grains and texture are studied. Examples for simultaneous texture and residual stress analyses are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006664007726
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    X-ray Analysis of Residual Stresses in C/SiC Composites (1999)
    Springer
    Applied composite materials 6 (1999), S. 51-66 
    Details
    ISSN: 1573-4897
    Keywords: X-rays ; residual stresses ; C/SiC composites ; fibre reinforced ceramic composites
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The residual stress state of C/SiC-composites, which are manufactured by a pyrolytical process is analysed by X-ray diffraction. The residual stress state in the composites results from the superposition of the shrinkage of the matrix material during the pyrolytical process and from effects of the thermal mismatch between fibres and matrix. The dependence of the residual stress state on the fibre coating and the process parameters of the pyrolytical process is determined. Furthermore, the change of the stress state in the samples submitting them to mechanical and thermal loads is analysed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008885319105
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  • 5
    Electronic Resource
    Electronic Resource
    Evaluation of residual stresses in the bulk of materials by high energy synchrotron diffraction (1998)
    Springer
    Journal of nondestructive evaluation 17 (1998), S. 129-140 
    Details
    ISSN: 1573-4862
    Keywords: Residual stress ; high energy synchrotron diffraction ; energy dispersive diffraction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract High energy synchrotron diffraction is introduced as a new method for residual stress analysis in the bulk of materials. It is shown that energy dispersive measurements are sufficiently precise so that strains as small 10−4 can be determined reliably. Due to the high intensity and the high parallelism of the high energy synchrotron radiation the sample gauge volume can be reduced to approximately 50 μm×1 mm×1 mm compared to gauge volume of one mm3 up to several mm3 achievable by neutron diffraction. The benefits of the high penetration depth and the small gauge volume are demonstrated by the results of stress studies performed on a fiber reinforced ceramic, a functional gradient material and a metal-ceramic compound. Furthermore, it is shown that in case of a cold extruded metal specimen the energy dispersive measurement technique yields simultaneous information about texture and residual stresses and thus allows a detailed investigation of elastic and plastic deformation gradients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02446116
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Evaluation of Residual Stresses in the Bulk of Materials by High Energy Synchrotron Diffraction (1998)
    Springer
    Journal of nondestructive evaluation 17 (1998), S. 129-140 
    Details
    ISSN: 1573-4862
    Keywords: Residual stress ; high energy synchrotron diffraction ; energy dispersive diffraction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract High energy synchrotron diffraction is introduced as a new method for residual stress analysis in the bulk of materials. It is shown that energy dispersive measurements are sufficiently precise so that strains as small 10−4 can be determined reliably. Due to the high intensity and the high parallelism of the high energy synchrotron radiation the sample gauge volume can be reduced to approximately 50 μm × 1 mm × 1 mm compared to gauge volume of one mm3 up to several mm3 achievable by neutron diffraction. The benefits of the high penetration depth and the small gauge volume are demonstrated by the results of stress studies performed on a fiber reinforced ceramic, a functional gradient material and a metal–ceramic compound. Furthermore, it is shown that in case of a cold extruded metal specimen the energy dispersive measurement technique yields simultaneous information about texture and residual stresses and thus allows a detailed investigation of elastic and plastic deformation gradients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022607030355
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Berechnungs- und experimentelle Verfahren zur Charakterisierung thermischer Mikroeigenspannungen in Stückverbunden (1997)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 28 (1997), S. 180-197 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Theoretical and Experimental Methods for the Determination of Thermal Residual Microstresses in Particle Reinforced Metal Matrix CompositesParticle reinforced metal matrix composites (PMMCs) comprising quasi ceramic hard phases in a metal matrix are used for wear protection in industry. During cooling residual microstresses emerge due to differences in the physical and mechanical properties of the metal matrix and the hard phases. Furtheron, the amount and distribution of the residual microstresses are influenced by the hard phase size, shape and distribution.For characterizing the residual microstress state theoretical methods (analytical and FEM calculations) as well as experimental methods (dilatometry, Micro-Moiré-methods, X-ray diffraction, angle dispersive neutron diffraction, neutron time-of-flight spectroscopy, torsion pendulum tests, differential calorimetry and ultra sonic absorption test) are used and assessed.
    Notes: Stückverbunde sind Teilchenverbundwerkstoffe, die aus einer metallischen Matrix (MM) mit eingelagerten quasikeramischen Hartphasen (HP) bestehen. Sie werden industriell zum Verschleißschutz eingesetzt. In Stückverbunden entstehen während der Abkühlung Mikroeigenspannungen aufgrund der unterschiedlichen physikalischen und mechanischen Eigenschaften der Hartphasen und der Metallmatrix. Weitere Einflußfaktoren auf die Höhe und Verteilung der Mikroeigenspannungen sind die Größe, Form und die Verteilung der Hartphasen.Zur Charakterisierung des Mikroeigenspannungszustandes werden Berechnungsverfahren (analytische Berechnungen, FEM) und experimentelle Verfahren (Dilatometrie, Mikro-Moiré-Verfahren, Röntgenbeugung, winkeldispersive Neutronenbeugung, Neutronenflugzeitspektrometrie, Torsionspendelversuche, Differentialkalorimetrie und Ultraschallabsorptionsmessungen) angewendet und bewertet.
    Additional Material: 25 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19970280409
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Berechnung der Umformeigenspannungen beim Fließpressen und Vergleich mit experimentellen Ergebnissen (1997)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 28 (1997), S. 417-423 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Determination of Deformation-induced Residual Stresses in Full Forward Extrusion and Comparison to Experimental ResultsThe macroscopic residual stresses induced by cold forward extrusion of rods are calculated by the finite element method. For an experimental determination of the residual stresses X-ray diffraction and neutron diffraction as well as the hole drilling method are applied. The results of the experiments and the calculations are in qualitative agreement, those of the experiments even are in good quantitative agreement. They allow the investigation of the influence of the processing parameters. Thus, a product optimisation with respect to residual stresses is enabled.
    Notes: Die beim Fließpressen erzeugten Eigenspannungen I. Art werden durch eine Simulation des Umformprozesses mit der Finite-Elemente-Methode berechnet. Zur experimentellen Bestimmung der Eigenspannungen werden die Röntgenbeugung, die Neutronen-beugung und das Bohrlochverfahren eingesetzt. Die Ergebnisse der Simulation und der Versuche stimmen qualitativ, die experimentellen Verfahren untereinander auch quantitativ überein. Sie ermöglichen es, den Einfluß der Variation unterschiedlicher Umformparameter auf den Eigenspannungszustand aufzuzeigen. Damit sind die Voraussetzungen für eine Erzeugnisoptimierung hinsichtlich des Eigenspannungszustandes gegeben.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19970280907
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    Paper (German National Licenses)
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