Search results for "Ultrasonic phased array"

showing 4 items of 4 documents

Ultrasonic phased array inspection of a Wire + Arc Additive Manufactured (WAAM) sample with intentionally embedded defects

2019

In this study, Wire + Arc Additive Manufacture (WAAM) was employed to manufacture a steel specimen with intentionally embedded defects which were subsequently used for calibration of an ultrasonic phased array system and defect sizing. An ABB robot was combined with the Cold Metal Transfer (CMT) Gas Metal Arc (GMA) process to deposit 20 layers of mild steel. Tungsten-carbide balls (ø1-3 mm) were intentionally embedded inside the additive structure after the 4th, 8th, 12th and 18th layers to serve as ultrasonic reflectors, simulating defects within the WAAM sample. An ultrasonic phased array system, consisting of a 5 MHz 64 Element phased array transducer, was used to inspect the WAAM sample…

0209 industrial biotechnologyIntentionally embedded defects Total focusing method (TFM) Ultrasonic phased array Wire + Arc Additive Manufacture (WAAM)Materials sciencePhased arrayAcousticsTKUltrasonic testingBiomedical EngineeringProcess (computing)02 engineering and technology021001 nanoscience & nanotechnologySample (graphics)Industrial and Manufacturing EngineeringSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di Macchinechemistry.chemical_compound020901 industrial engineering & automationchemistryTungsten carbideCalibrationGeneral Materials ScienceUltrasonic sensor0210 nano-technologyMetal transferEngineering (miscellaneous)
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Ultrasonic phased array inspection of wire plus arc additive manufacture samples using conventional and total focusing method imaging approaches

2019

In this study, three aluminium samples produced by wire + arc additive manufacture (WAAM) are inspected using ultrasonic phased array technology. Artificial defects are machined using a centre drill, ø 3 mm, and electrical discharge machining (EDM), ø 0.5-1 mm, in a cylindrical through-hole topology. The samples are first inspected using a single-element wheel probe mounted on a KUKA robot in order to investigate the feasibility of using a conventional ultrasonic transducer approach. Unfortunately, the wheel probe is found to be unsuitable for scanning the WAAM specimens and ultrasonic phased arrays are employed next. The set-up includes 5 MHz and 10 MHz arrays (128 elements) in direct cont…

Materials sciencebusiness.product_categoryartificial defectsArtificial defects Full matrix capture (FMC) Total focusing method (TFM) Ultrasonic phased array Wire + arc additive manufacture (WAAM)Phased arrayApertureController (computing)AcousticsTK0211 other engineering and technologies02 engineering and technologytotal focusing method (TFM)01 natural sciencesSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineMachiningwire plus arc additive manufacture (WAAM)0103 physical sciencesMaterials Chemistry010301 acoustics021103 operations researchDrillMechanical EngineeringMetals and Alloysfull matrix capture (FMC)Sample (graphics)Wedge (mechanical device)Mechanics of Materialsultrasonic phased arrayUltrasonic sensorbusiness
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Continuous monitoring of an intentionally-manufactured crack using an automated welding and in-process inspection system

2020

Abstract Automated weld deposition coupled with the real-time robotic Non-Destructive Evaluation (NDE) is used in this paper. For performance verification of the in-process inspection system, an intentionally embedded defect, a tungsten rod, is introduced into the multi-pass weld. A partially-filled groove (staircase) sample is also manufactured and ultrasonically tested to calibrate the real-time inspection implemented on all seven layers of the weld which are deposited progressively. The tungsten rod is successfully detected in the real-time NDE of the deposited position. The same robotic inspection system was then used to continuously monitor an intentionally-manufactured crack for 20 h.…

Ultrasonic phased arrayMaterials scienceTKMechanical engineeringchemistry.chemical_element02 engineering and technologyWeldingTungsten010402 general chemistryRobotic NDE01 natural sciencesSignallaw.inventionRobot weldingSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di Macchinelawlcsh:TA401-492Deposition (phase transition)In-process inspectionRobotic weldingGeneral Materials ScienceIntentionally manufactured weld defectsGroove (music)Mechanical EngineeringContinuous monitoringCrack growth monitoringWork in process021001 nanoscience & nanotechnology0104 chemical scienceschemistryMechanics of Materialslcsh:Materials of engineering and construction. Mechanics of materials0210 nano-technology
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Ultrasonic phased array inspection of wire plus arc additive manufacture ‎‎(WAAM) samples using conventional and total focusing method (TFM) ‎imaging…

2018

In this study, three aluminium samples produced by wire + arc additive manufacture (WAAM) are inspected using ultrasonic phased array technology. Artificial defects are machined using a centre drill, ø3 mm, and electro-discharge machining (EDM), ø0.5-1 mm, in a cylindrical through hole topology. The sample was first inspected by a single element wheel probe mounted on a KUKA robot in order to investigate the feasibility of using a conventional ultrasonic transducer approach. Unfortunately, the wheel probe was found to be unsuitable for scanning of the WAAM specimens and ultrasonic phased arrays were employed next. The setup included 5 MHz and 10 MHz arrays (128 elements) in direct contact w…

Ultrasonic phased arraySettore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineWire + Arc additive manufacture (WAAM)Full matrix capture (FMC)Total focusing method (TFM)Artificial defects
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