Residual stress distributions and their influence on fatigue lifetimes

Webster, G. A.; Ezeilo, A.N.

doi:10.1016/s0142-1123(01)00133-5

Cited by 387 publications

(183 citation statements)

References 17 publications

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“…[1][2][3][4][5][6][7] There are many ways to reduce potentially harmful residual stress to prolong service life, such as annealing, [8,9] pre-stretching, [6] and shakedown. [10][11][12] For the purpose of accurate assessment of fatigue lifetime, not only the magnitude of the residual stresses, but also their stability factors and evolution during service are of great importance.…”

Section: Introductionmentioning

confidence: 99%

The Residual Stress Relaxation Behavior of Weldments During Cyclic Loading

Qian

Chumbley

Karakulak

et al. 2013

Metall Mater Trans A

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Accurate measurement of residual stress is necessary to obtain reliable predictions of fatigue lifetime and enable estimation of time-to-facture for any given stress level. In this article, relaxation of welding residual stresses as a function of cyclic loading was documented on three common steels: AISI 1008, ASTM A572, and AISI 4142. Welded specimens were subjected to cyclic bending (R = 0.1) at different applied stresses, and the residual stress relaxation existing near the welds was measured as a function of cycles. The steels exhibited very different stress relaxation behaviors during cyclic loadings, which can be related to the differences in the microstructures of the specimens. A phenomenological model, which treats dislocation motion during cyclic loading as being analogous to creep of dislocations, is proposed for estimation of the residual stress relaxation. Accurate measurement of residual stress is necessary to obtain reliable predictions of fatigue lifetime and enable estimation of time-to-facture for any given stress level. In this article, relaxation of welding residual stresses as a function of cyclic loading was documented on three common steels: AISI 1008, ASTM A572, and AISI 4142. Welded specimens were subjected to cyclic bending (R = 0.1) at different applied stresses, and the residual stress relaxation existing near the welds was measured as a function of cycles. The steels exhibited very different stress relaxation behaviors during cyclic loadings, which can be related to the differences in the microstructures of the specimens. A phenomenological model, which treats dislocation motion during cyclic loading as being analogous to creep of dislocations, is proposed for estimation of the residual stress relaxation. Keywords Surfaces and Interfaces, Thin Films Nanotechnology

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Section: Introductionmentioning

confidence: 99%

The Residual Stress Relaxation Behavior of Weldments During Cyclic Loading

Qian

Chumbley

Karakulak

et al. 2013

Metall Mater Trans A

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“…Compressive surface residual stresses helps to improve the life of engineering components by retarding fatigue crack initiation and growth [10,11]. Depending on the peening conditions used and the initial surface state, there may also be an improvement in surface finish.…”

Section: Introductionmentioning

confidence: 99%

Effect of shot peening on the fatigue behaviour of cast magnesium A8

Barry

Hainsworth

Fitzpatrick

2009

Materials Science and Engineering: A

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractShot peening is known to improve the fatigue performance of structural metallic materials. The improvement in fatigue life is derived primarily from compressive residual stresses that are introduced into the near-surface of the components and which hinder crack initiation and growth.Magnesium alloys are finding increasing use in automotive applications, but their relatively low strength means that they are highly susceptible to fatigue failures. This is particularly the case for cast alloys which may contain high levels of porosity. Shot peening may be of use, but the beneficial effect of the compressive stress may be offset by the surface damage associated with peening of a soft material.In this study the fatigue life of sand-cast A8 magnesium alloy has been investigated before and after a shot peening treatment to investigate whether shot peening is beneficial for a component with this combination of relatively low strength and relatively poor initial surface finish. Previous studies into the effect of shot peening on magnesium alloys have been limited to wrought alloys and there has been little work on the influence of shot peening on cast magnesium alloys. The residual stress before and after peening was determined by incremental hole drilling which shows that the peening process generated a compressive residual stress in the cast specimens. The fatigue results show that the fatigue life is significantly improved by the shot peening process, and there is also an improvement in the endurance limit. An increase in the surface roughness of the samples was found after peening but this was not found to be detrimental to the fatigue performance.

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“…One of the most used experimental methods for measurement of residual stresses is the x-ray diffraction (Webster and Ezeilo, 2001). This method is frequently used in cases of cold expanded holes (Maximov et al, 2009;2012;2014).…”

Section: Nature Of the Employed Methodsmentioning

confidence: 99%

Enhancement of fatigue life of rail-end-bolt holes by slide diamond burnishing

Maximov¹,

Duncheva²,

Anchev³

et al. 2014

10.5267/j.esm

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The fatigue failure around rail-end-bolt holes is particularly dangerous since it leads to derailment of trains and consequently to inevitable accidents. It is well-known that the fatigue life of structural holed components, subjected to cyclic load, can be increased by generating compressive hoop stresses around the holes. These beneficial residual compressive stresses significantly reduce the maximum values of the operating tensile stresses arising at the critical points of the components and thus impede the formation of first mode cracks. A new approach to enhancement of fatigue life of rail-end-bolt holes has been developed. The approach involves sequential drilling and reaming through a new combined tool and then slide diamond burnishing by a new device. The technology implementation was carried out on machine tool. The process of creating residual stresses has been studied both experimentally and numerically. The experimental study was conducted by means of a modified split ring method. A reliable finite element modeling approach to the slide diamond burnishing process was developed. On this basis, the process was optimized by means of a genetic algorithm. As a result, the optimal combination of the governing process parameters is established, which ensures both maximum depth of the compressive zone and maximum absolute values of the residual stresses.

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Residual stress distributions and their influence on fatigue lifetimes

Cited by 387 publications

References 17 publications

The Residual Stress Relaxation Behavior of Weldments During Cyclic Loading

The Residual Stress Relaxation Behavior of Weldments During Cyclic Loading

Effect of shot peening on the fatigue behaviour of cast magnesium A8

Enhancement of fatigue life of rail-end-bolt holes by slide diamond burnishing

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