High-speed inspection of rails using ACFM techniques

Papaelias, Mayorkinos; Lugg, Martin; Roberts, Clive; Davis, Claire

doi:10.1016/j.ndteint.2008.12.008

Cited by 91 publications

(45 citation statements)

References 13 publications

(14 reference statements)

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“…Results from the experiments carried out on the rail rig at the Birmingham Rail Research Centre up to 48 km/h have also been reported (4)(5)(6) . However, one of the problems during the rail rig tests was the varying lift-off due to the limitations of the experimental configuration employed.…”

Section: Rail Rig Acfm Testingmentioning

confidence: 87%

“…ACFM experiments successfully carried out at inspection speeds up to 121.5 km/h on a turning lathe-based test-rig using a special rotary test-piece containing four transverse spark-eroded notches (2 x 2 mm and 2 x 4 mm deep with a flat profile) have been reported previously (4)(5)(6) . Results from the experiments carried out on the rail rig at the Birmingham Rail Research Centre up to 48 km/h have also been reported (4)(5)(6) .…”

Section: Rail Rig Acfm Testingmentioning

confidence: 94%

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Further developments in high-speed detection of rail rolling contact fatigue using ACFM techniques

Papaelias¹,

Roberts²,

Davis³

et al. 2010

Insight - Non-Destructive Testing and Condition Monitoring

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The performance of existing ultrasonic and magnetic flux leakage techniques in detecting rail surface-breaking defects such as head checks and gauge corner cracking is inadequate during high-speed inspection, while eddy current sensors suffer from lift-off effects. Early detection of such rail defects is of paramount importance since a single crack can potentially lead to fatigue failure. The results obtained through rail inspection experiments under simulated conditions using an alternating current field measurement (ACFM) micro-pencil probe suggest that this technique can be applied for the accurate and reliable detection of surfacebreaking defects at high inspection speeds.

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Section: Rail Rig Acfm Testingmentioning

confidence: 87%

Section: Rail Rig Acfm Testingmentioning

confidence: 94%

Further developments in high-speed detection of rail rolling contact fatigue using ACFM techniques

Papaelias¹,

Roberts²,

Davis³

et al. 2010

Insight - Non-Destructive Testing and Condition Monitoring

View full text Add to dashboard Cite

show abstract

“…Further research will explore more on lift-off effect and its influence reduction [14,15], impact of deviations from the defects, scan speed [16], and…”

Section: Discussionmentioning

confidence: 99%

Detection and evaluation of weld defects in stainless steel using alternating current field measurement

Weili¹,

Ma²,

Pan-Qi³

et al. 2018

AIP Conference Proceedings

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An ultrasonic non-destructive testing method for the measurement of weld width in laser welding of stainless steel AIP Conference Proceedings 1890, 040082 (2017) Abstract. Stainless steel is widely used in nuclear power plants, such as various high-radioactive pool, tools storage and fuel transportation channel, and serves as an important barrier to stop the leakage of high-radioactive material. NonDestructive Evaluation (NDE) methods, eddy current testing (ET), ultrasonic examination (UT), penetration testing (PT) and hybrid detection method, etc., have been introduced into the inspection of a nuclear plant. In this paper, the Alternating Current Field Measurement (ACFM) was fully applied to detect and evaluate the defects in the welds of the stainless steel. Simulations were carried out on different defect types, crack lengths, and orientation to reveal the relationship between the signals and dimensions to determine whether methods could be validated by the experiment. A 3-axis ACFM probe was developed and three plates including 16 defects, which served in nuclear plant before, were examined by automatic detection equipment. The result shows that the minimum detectable crack length on the surface is 2mm and ACFM shows excellent inspection results for a weld in stainless steel and gives an encouraging prospect of broader application.

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“…Alternatively, ACFM probes could be mounted on pigs or robotic crawlers to carry out an internal inspection for the detection of corrosion-related defects and fatigue cracks. Furthermore, ACFM inspection can be carried out at speed with negligible changes in the resulting signal [53,54].…”

Section: Alternating Current Field Measurement (Acfm)mentioning

confidence: 99%

Inspection and Structural Health Monitoring techniques for Concentrated Solar Power plants

et al. 2016

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a b s t r a c tParabolic trough concentrators are the most widely deployed type of solar thermal power plant. The majority of parabolic trough plants operate up to 400 C. However, recent technological advances involving molten salts instead of oil as working fluid the maximum operating temperature can exceed 550 C. CSP plants face several technical problems related to the structural integrity and inspection of critical components such as the solar receivers and insulated piping of the coolant system. The inspection of the absorber tube is very difficult as it is covered by a cermet coating and placed inside a glass envelope under vacuum. Volumetric solar receivers are used in solar tower designs enabling increased operational temperature and plant efficiency. However, volumetric solar receiver designs inherently pose a challenging inspection problem for maintenance engineers due to their very complex geometry and characteristics of the materials employed in their manufacturing. In addition, the rest of the coolant system is insulated to minimise heat losses and therefore it cannot be inspected unless the insulation has been removed beforehand. This paper discusses the non-destructive evaluation techniques that can be employed to inspect solar receivers and insulated pipes as well as relevant research and development work in this field.

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High-speed inspection of rails using ACFM techniques

Cited by 91 publications

References 13 publications

Further developments in high-speed detection of rail rolling contact fatigue using ACFM techniques

Further developments in high-speed detection of rail rolling contact fatigue using ACFM techniques

Detection and evaluation of weld defects in stainless steel using alternating current field measurement

Inspection and Structural Health Monitoring techniques for Concentrated Solar Power plants

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