Relaxation of Residual Stresses due to Fatigue Loading

Morrow, JoDean; Ross, Alan S. C.; Sinclair, G. M.

doi:10.4271/600008

Cited by 21 publications

(15 citation statements)

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“…It has been suggested that stress concentrators may be the mechanism for relaxation in this regime (Nelson et al, 1970;Ericsson et al, 1971;Turovskii et al, 1976). Support for this idea of local yielding can also be found in the work of Morrow and Sinclair (1960) who found that the harder the steel, the less the fading.…”

Section: Residual Stresses In Fatiguesupporting

confidence: 52%

“…Perhaps another example of this effect is the recent finding that in steels containing appreciable quantities of pearlite, stresses are detected with x-rays when there were none initially (Morrow et al, 1960;Ziegeldorf, 1976) and that stresses can increase as well as decrease (Ericsson, private communication). There will always be some form of stress concentration, grain junctions, dislocation pile-ups, etc.…”

Section: Residual Stresses In Fatiguementioning

confidence: 99%

“…The relaxation rate is most rapid in the early part of fatigue life (Morrow et al, 1960;Koves, 1965;Esquivel, 1968;Ericsson et al, 1971;Seppi, 1976;and Leverant et al, 1978). Quantitative relations based on a linear proportionality between residual stress and the logarithm of the number of cycles have been empirically established (Kodama, 1971(Kodama, , 1972Potter and coworkers, 1972;Wohlfahrt, 1973;Radhakrishnan and Prasad,1976).…”

Section: Residual Stresses In Fatiguementioning

confidence: 99%

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The Measurement of Residual Stresses by X-Ray Diffraction Techniques

James

Cohen

1980

Experimental Methods

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Section: Residual Stresses In Fatiguesupporting

confidence: 52%

Section: Residual Stresses In Fatiguementioning

confidence: 99%

Section: Residual Stresses In Fatiguementioning

confidence: 99%

See 1 more Smart Citation

The Measurement of Residual Stresses by X-Ray Diffraction Techniques

James

Cohen

1980

Experimental Methods

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“…Several studies [12,44] present evidence exists linking residual stress relaxation behavior to the microstructures/dislocation density of the material. For example, Walker et al [12] found a correlation between evolution of residual stress and dislocation density on cold-rolled mild steel EN3b.…”

Section: B Microstructures and Dislocationsmentioning

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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“…They researched the effects of the number of repeated loads and the size of the external load on 700-MPa grade carbon steels. [7][8][9] Nevertheless, they used experimental methods with fatigue specimens and did not consider residual stress relief problems. Accordingly, in this study, a finite element analysis model for prediction of the welding residual stress for multipass weldments of 1100-MPa high-strength steel and for prediction of the mechanical stress relaxation after external repeated loads was presented and verified through an experimental method.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Welding Residual Stress Relaxation in High-Strength Multilayer Weldment Under Fatigue Loads

Yi¹,

Lee

2017

Metall Mater Trans B

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The primary purpose of this investigation was to study welding residual stress relaxation by repeated loading. A coupling finite element analysis model for prediction of the welding residual stress and the mechanical stress relaxation after external repeated loads was presented. The accuracy of this model was verified through experiments. Also, it is found that the residual stress of weldment is relaxed by external loads, and the greatest amount of relaxation was obtained by early repeated loads. As the repetition count increased, the amount of relaxation became smaller than the amount of relaxation in the early stage.

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Relaxation of Residual Stresses due to Fatigue Loading

Cited by 21 publications

References 0 publications

The Measurement of Residual Stresses by X-Ray Diffraction Techniques

The Measurement of Residual Stresses by X-Ray Diffraction Techniques

The Residual Stress Relaxation Behavior of Weldments During Cyclic Loading

Numerical Analysis of Welding Residual Stress Relaxation in High-Strength Multilayer Weldment Under Fatigue Loads

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