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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Properties and performance of titanium alloy processed by electron beam melting additive manufacturing
TL;DR: In this article, a comprehensive study was carried out to fully comprehend the potential of this 3D metal printing technology for applications of customised titanium parts subjected to different operating conditions, and Hot Isostatic Pressing technique was used to improve the mechanical properties of final titanium parts.
Journal ArticleDOI
Predictions of elastic-plastic crack driving force and redistribution under combined primary and secondary stresses – Part 2: Experimental application
TL;DR: In this paper, a new function, g, was introduced to quantify the influence of plasticity interaction under combined primary and secondary loads with plasticity, and new experiments were performed on three point bend specimens that had experienced a pre-compression to induce a residual stress field before being tested to failure at −150, −90 and −50°C to correspond to varying levels of plasticy, and hence L r at fracture.
Dissertation
Residual stress evaluation and modelling at the micron scale
TL;DR: In this paper, the effects of residual stresses in engineering components were evaluated at the micro-scale using FIB-DIC micro-ring-core milling and synchrotron XRD to study residual stress effects on fatigue crack growth propagation rate following overload or underload.
Journal ArticleDOI
Validation of Mechanical Strain Relaxation Methods for Stress Measurement
D. M. Goudar,David J. Smith +1 more
TL;DR: In this paper, the authors used simple applied stress profiles in rectangular steel beams, together with beams subjected to elastic-plastic bending and finite element analyses to determine the accuracy in the inversion of measured deformation to reconstruct stress.
Journal ArticleDOI
Analysis of the electrical discharge machining (EDM) performance on Ramor 550 armor steel
TL;DR: In this article, the electrical discharge machining (EDM) performance of Ramor 500 Armor steel, a material used in the defense industry for armor production, was investigated, and the performance of the surfac...
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.