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
More filters
Journal ArticleDOI
Additive manufacturing of metallic components – Process, structure and properties
Tarasankar Debroy,Huiliang Wei,J.S. Zuback,T. Mukherjee,John W. Elmer,John O. Milewski,Allison M. Beese,Alexander E. Wilson-Heid,Amitava De,Wei Zhang +9 more
TL;DR: A review of the emerging research on additive manufacturing of metallic materials is provided in this article, which provides a comprehensive overview of the physical processes and the underlying science of metallurgical structure and properties of the deposited parts.
Journal ArticleDOI
Recent advances in friction-stir welding : Process, weldment structure and properties
TL;DR: In this article, the authors deal with the fundamental understanding of the process and its metallurgical consequences, focusing on heat generation, heat transfer and plastic flow during welding, elements of tool design, understanding defect formation and the structure and properties of the welded materials.
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.
Journal ArticleDOI
Steels for bearings
TL;DR: In this paper, the structure and properties of bearing steels prior to the point of service are first assessed and described in the context of steelmaking, manufacturing and engineering requirements, followed by a thorough critique of the damage mechanisms that operate during service and in accelerated tests.
Journal ArticleDOI
Investigations on residual stresses and deformations in selective laser melting
TL;DR: The presented work contains particular approaches using the FEA for the simulation of transient physical effects within the additive layer manufacturing (ALM) process that focus on coupled thermo-mechanical models incorporating specific boundary conditions and temperature dependant material properties to identify the heat impact on residual stresses and deformations.
References
More filters
Journal ArticleDOI
Neutron and synchrotron x-ray strain scanning
Philip J. Withers,P.J. Webster +1 more
TL;DR: Neutron and synchrotron X-ray strain scanning provides the opportunity for mapping residual strain distributions within polychrystalline materials, non-destructively as mentioned in this paper, and the capabilities and complementarity of the two methods are reviewed and contrasted in this paper through a series of case studies.
Journal ArticleDOI
Edge Stresses in Alumina/Zirconia Laminates
TL;DR: In this article, the authors used fluorescence piezospectroscopy to determine the distribution of thermal residual stresses across the edges of three laminated alumina/zirconia composites.
Journal ArticleDOI
Mechanical measurement of the residual stress in thin PVD films
Roe René Vijgen,J.H Dautzenberg +1 more
TL;DR: In this article, a practical bending plate method is proposed to calculate the residual stress present in thin physical vapour deposition films, where a thin circular foil of stainless steel is coated with TiN, using an unbalanced magnetron sputtering technique.
Journal ArticleDOI
Study of model polydiacetylene/epoxy composites: Part 2 Effect of resin shrinkage
TL;DR: In this paper, a composite modele constitue d'une monofibre cristalline de polydiacetylene dans a resine epoxyde is presented.
Journal ArticleDOI
Investigation of residual stress generation during thermal spraying by continuous curvature measurement
S.C. Gill,T.W. Clyne +1 more
TL;DR: In this article, the latest developments of an in situ curvature-monitoring technique for thermal spray processes, including automated video image analysis, are described, using this technique, curvature measurements have been made while vacuum plasma spraying molybdenum onto stainless steel and titanium alloy substrates.