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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Dissertation
Flow forming of aeroengine materials
TL;DR: In this paper, the authors focused on the characterization of flow formed component to understand the process and showed that residual stresses in the axial and hoop direc-tions are critical, therefore, stress distributions through thickness of the samples are plotted.
Journal ArticleDOI
Modelling and neutron diffraction characterization of the interfacial bonding of spray formed dissimilar steels
Tung Lik Lee,Tung Lik Lee,Jiawei Mi,S. Ren,Shiteng Zhao,J. Fan,Saurabh Kabra,S.Y. Zhang,Patrick S. Grant +8 more
TL;DR: In this article, a spray forming of thick, dissimilar steel clad tubes with the objective of achieving a high integrity metallurgical bond across the cladding-substrate interface able to withstand residual stresses and subsequent thermo-mechanical processing was investigated by large scale experiments, modelling and extensive microstructural characterization including microscopy, X-ray tomography, neutron scattering and mechanical testing.
Characterisation of Ti-6Al-4V deposits produced by arc-wire based additive manufacture
TL;DR: In this paper, the authors present an overview of the production and manufacturing of Ti-6Al-4V components, including the Alloy Classification and Alloy Classification of Titanium and its Alloys.
Journal ArticleDOI
A Review of Diagnostics Methodologies for Metal Additive Manufacturing Processes and Products
Teng Yang,Sangram Mazumder,Yuqi Jin,Brian Squires,Mathew Sofield,Mangesh V. Pantawane,Narendra B. Dahotre,Arup Neogi +7 more
TL;DR: In this article, a review summarizes and discusses various ex-situ inspections and in-sit monitoring methods, including electron-based methods, thermal methods, acoustic methods, laser breakdown, and mechanical methods, for metal additive manufacturing.
Journal ArticleDOI
Stress evaluation in thin films: Micro-focus synchrotron X-ray diffraction combined with focused ion beam patterning for do evaluation
Nikolaos Baimpas,Eric Le Bourhis,S. Eve,Dominique Thiaudière,Christopher D. Hardie,Alexander M. Korsunsky +5 more
TL;DR: In this article, the authors used the focused ion beam (FIB) to generate a built-in strain-free reference by patterning (milling) a 50-×-50-μm 2 region of the coating to produce an array of small stress-relieved islands.
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.