Journal ArticleDOI
Residual stress. Part 1 – Measurement techniques
TLDR
In this paper, the effect of residual stresses on fatigue lifetimes and structural integrity are first summarised, followed by the definition and measurement of residual stress, which are characterised according to the characteristic length scale over which they self-equilibrate.Abstract:
Residual stress is that which remains in a body that is stationary and at equilibrium with its surroundings. It can be very detrimental to the performance of a material or the life of a component. Alternatively, beneficial residual stresses can be introduced deliberately. Residual stresses are more difficult to predict than the in-service stresses on which they superimpose. For this reason, it is important to have reliable methods for the measurement of these stresses and to understand the level of information they can provide. In this paper, which is the first part of a two part overview, the effect of residual stresses on fatigue lifetimes and structural integrity are first summarised, followed by the definition and measurement of residual stresses. Different types of stress are characterised according to the characteristic length scale over which they self-equilibrate. By comparing this length to the gauge volume of each technique, the capability of a range of techniques is assessed. In the sec...read more
Citations
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Journal ArticleDOI
Residual thermal stresses in carbon/carbon–Zr–Ti–C composites and their effects on the fracture behavior of composites with different preforms
TL;DR: In this article, the residual thermal stress (RTS) distribution in the C/C-Zr-Ti-C composites was analyzed by Raman spectroscopy and finite element (FE) calculation.
Journal ArticleDOI
Power beam welding of thick section nickel base superalloys
N. C. Sekhar,Roger C. Reed +1 more
TL;DR: In this paper, a study of the power beam welding of two precipitation strengthened nickel base superalloys, Waspaloy and Udimet 720Li, which are widely used in the gas turbine industry is presented.
Journal ArticleDOI
A numerical and experimental investigation into residual stress in thermally sprayed coatings
A M Kamara,Keith Davey +1 more
TL;DR: In this paper, an investigation into the thermal spray process and the residual stresses that arise when a steel-alloy coating is sprayed onto a copper substrate was performed using experimentation, simplified numerical modeling and finite element modelling.
Journal ArticleDOI
Finite element simulation and experimental investigation of residual stresses in ultrasonic assisted turning.
TL;DR: The results of thermo mechanical finite element simulation and experimental studies of residual stresses during UAT of AISI 4140 has been studied to determine the effect of vibration and machining parameters (cutting speed and feed rate) on the magnitude and type of surface residual stresses in the workpiece machined by UAT.
Journal ArticleDOI
In situ neutron diffraction measurement of residual stress relaxation in a welded steel pipe during heat treatment
Bo Chen,A. Skouras,Yiqiang Wang,Joe Kelleher,Joe Kelleher,Shu Yan Zhang,David J. Smith,Peter E J Flewitt,Martyn J Pavier +8 more
TL;DR: In this paper, the authors measured residual stresses in a butt-welded ferritic steel pipe as the pipe is heat treated to 650°C and then cooled to room temperature.
References
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Book
Elements of X-ray diffraction
TL;DR: In this article, the authors present a chemical analysis of X-ray diffraction by Xray Spectrometry and phase-diagram Determination of single crystal structures and phase diagrams.
Book
Encyclopedia of Materials: Science and Technology
K. H. Jürgen Buschow,Robert W. Cahn,Merton C. Flemings,Bernhard Ilschner,Edward J. Kramer,Subhash Mahajan +5 more
TL;DR: In this article, the fundamental core theory of functional properties and properties of materials are discussed. But the authors focus on the physical properties of thin films and artificial multilayers, rather than the structural properties of the materials themselves.
Journal ArticleDOI
Residual stress. Part 2 – Nature and origins
TL;DR: In this paper, the authors examine the nature and origins of residual stresses across a range of scales, from the long range residual stress fields in engineering components and welded structures, through the interphase stresses present in composites and coatings, to the microscale interactions of phase transformations with local stresses.
Book
Handbook of Measurement of Residual Stresses
TL;DR: In this paper, the authors describe a sequence of residual stress measurements made to determine a Handbook on Stiffness & Damping in Mechanical Design, which can be used to compare different methods of measuring residual stress.