Characterization of texture and residual stress in a section of 610 mm pipeline steel

Clapham, L.; Krause, Thomas W.; Olsen, H.; Ma, Bingxin; Atherton, D.L.; Clark, Paul; Holden, T. M.

doi:10.1016/0963-8695(94)00005-5

Cited by 36 publications

(13 citation statements)

References 7 publications

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“…This may be attributed to the presence of a residual compressive surface stress present within the pipe. This suggestion is supported by spring-back measurements observed when the pipe section was cut in half [22].…”

Section: Semicirciilnr Pipe Section: Mflll Measiireriteiitsmentioning

confidence: 52%

“…A further complication in this system is the direction of the magnetic easy axis with respect to the direction of the applied stress. The magnetic easy axis is at 90' to the direction of the applied stress, and, therefore, the magnetic properties of the pipeline steel are different [2 I ] from those where the stress and easy axis are aligned in the same direction [22]. Geometric properties of the semicircular pipe stress rig also may play a role in affecting the stress-dependent variation of the MFL,, signal, since the radius of curvature and therefore the length of the flux path in the seniicircular pipe section changes as a function of stress with respect to the fixed length of the magnetizer.…”

Section: Semicirciilnr Pipe Section: Mflll Measiireriteiitsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Stress Concentration on Magnetic Flux Leakage Signals from Blind-Hole Defects in Stressed Pipeline Steel

Krause

Little

Barnes

et al. 1996

Research in Nondestructive Evaluation

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Stress-dependent magnetic flux leakage (MFL) signals of the normal surface component (radial) MFLsignal from blind-holedefects in pipeline steel were investigated.Three different stress rigs with uniaxial stress and field configurations were used. A double-peak feature in the MFL signal was defined quantitatively by a saddle amplitude, which was taken as the difference between the average of the double peaks and the corresponding saddle point. Results indicated that the saddle amplitude increased linearly with increasing tensile surface stress and decreased, or did not exist, for increasing compressive surface stress. The stress-dependent saddle amplitude was shown to increase with increasing defect depth. Finite-element calculations indicated that stress concentration also increased with increasing defect depth. The measurements and analysis demonstrate that the stress-dependent saddle amplitude behavior in the radial MFL signal is associated with surface-stress concentrations near the blind-hole defects.

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Section: Semicirciilnr Pipe Section: Mflll Measiireriteiitsmentioning

confidence: 52%

Section: Semicirciilnr Pipe Section: Mflll Measiireriteiitsmentioning

confidence: 99%

Effect of Stress Concentration on Magnetic Flux Leakage Signals from Blind-Hole Defects in Stressed Pipeline Steel

Krause

Little

Barnes

et al. 1996

Research in Nondestructive Evaluation

Self Cite

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“…The objective is to calculate the stress concentration factor [30]. The latter is determined by the ratio between the maximum stress component in the pipeline corroded area and the nominal stress for healthy pipeline (for each assumed case of corrosion dimension).…”

Section: Finite Element Modelingmentioning

confidence: 99%

Pipelines Reliability Analysis Under Corrosion Effect and Residual Stress

et al. 2015

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This work focuses on a development of a finite element model that simulates corrosion phenomenon and its influence on structure rupture (pipelines). Subsequently, the pitting effect on reliability and pipelines lifetime is studied. In this paper, the investigated structure material is characterized experimentally, in order to determine the maximum strength and stress resistance. Therefore, a numerical model was developed under ANSYS code to simulate different loads to obtain the stress concentration factor as the stresses could surpass the yielding limit in the corrosion impact, and to determine the Von Mises stress. A corrosion model and residual stresses used in the literature are coupled with the probabilistic model to find the limit state function. Thus, failure probability and structure reliability index under the effect of pitting corrosion phenomena are calculated and the obtained results are discussed and analyzed.

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“…In the literature, a parameter defined as below has been used as an empirical texture parameter [14] k Z ðV p Þ RD K ðV p Þ TD ðV p Þ RD C ðV p Þ TD (1) Fig. 6 shows the plots on the variation of k as a function of the amount of martensite.…”

Section: Empirical Texture Parameter From Mbe Plotsmentioning

confidence: 99%

“…In the literature, the use of magnetic techniques including MBE, magnetic hysteresis loop parameters and magnetic fluxgate magnetometer have been reported for the measurement of the amount of the magnetic phase [8][9][10][11][12]. Texture or preferred crystallographic orientations have been characterized by torque magnetometer [13] and MBE technique [14][15][16]. However, we have found that although attempts have been made to understand the nature of domain movements (leading to the preferred orientations), and reference to the data pertaining to texture by XRD, no systematic study comparing the data obtained by a diffraction technique and a magnetic technique like MBE are reported.…”

Section: Introductionmentioning

confidence: 99%