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
In-situ residual stress reduction, martensitic decomposition and mechanical properties enhancement through high temperature powder bed pre-heating of Selective Laser Melted Ti6Al4V
TL;DR: In this article, a high temperature SLM powder bed capable of pre-heating to 800°C was used during processing of Ti6Al4V feedstock, and the effect of powder bed temperature on residual stress formation and mechanical properties was investigated.
Journal ArticleDOI
A review of wire arc additive manufacturing and advances in wire arc additive manufacturing of aluminium
TL;DR: Although wire arc additive manufacturing (WAAM) has proven its capability of fulfilling demands of production of medium-to-large-scale components for automotive and allied sectors made up of alumin...
Journal ArticleDOI
The contribution of friction to the dislocation resistance of bonded fiber posts.
Cecilia Goracci,Andrea Fabianelli,Fernanda Tranchesi Sadek,Federica Papacchini,Franklin R. Tay,Marco Ferrari +5 more
TL;DR: The null hypothesis that the use of dentin adhesives produces no improvement on the fixation of fiber posts with resin cements in endodontically treated teeth was tested and the dislocation resistance of bonded fiber posts was contributed largely by sliding friction.
Book
Friction Stir Welding and Processing : Science and Engineering
TL;DR: Friction stir welding as discussed by the authors is a well-studied process for friction-stir welding, where the process parameters, material flow and micro-structural evolution, tool features and role are modeled and simulated.
Journal ArticleDOI
Residual Stress and Distortion Modeling of Electron Beam Direct Manufacturing Ti-6Al-4V
TL;DR: In this paper, a finite element model is developed for predicting the thermo-mechanical response of Ti-6Al-4V during electron beam deposition, and both in situ distortion and post-process residual stress measurements suggest that stress relaxation occurs during the deposition of a single-bead wide, 16-layer-high wall built for model validation.
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.