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Control strategies and inspection methods for welded part
Karlstad University, Faculty of Technology and Science, Department of Mechanical and Materials Engineering.
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Present and future demonstrator designs were used to demonstrate the quality assurance of welds. The NDT methods tested on prototype demonstrator parts are: visual inspection, radius gauges, throat size gauge, liquid-penetrant testing, magnetic particle testing and ultrasonics with pulse echo and phased array. The other methods like eddy current, time of flight diffraction, radiography, impression test, macro test and infrared thermographs are currently being analyzed along with their inspection costs.


The control plans for present and future designs with corresponding present and future NDT methods are suggested to minimize a shift in process.

  • Magnetic particle testing revealed a lack of fusion and cracks for fillet welds, whereas ultrasonic pulse echo and phased array identified an internal lack of fusion, inner pores/slag inclusions on butt welds.
  • Ultrasonic PAUT & TOFD could be used for accurate defect identification and thermography for online identification of lack of penetration, depth of penetration and weld parameters.
Place, publisher, year, edition, pages
2013. , 75 p.
Keyword [en]
Visual inspection, WPS, impressions, throat size gauge, radius gauge, liquid penetrant test, magnetic particle testing, eddy current, radiography, ultrasonic (PAUT & TOFD), thermography, control plan, cost per hour.
National Category
Other Mechanical Engineering
URN: urn:nbn:se:kau:diva-16383Local ID: MT:1OAI: diva2:588294
External cooperation
Volvo Construction Equipment
Subject / course
Mechanical Engineering
2012-10-09, 1B 364, Karlstads Universitet, Karlstad, 13:46 (English)
Weight reduction by improved weld quality (WIQ)
Available from: 2013-01-23 Created: 2013-01-15 Last updated: 2013-01-23Bibliographically approved

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Baradi, Divyank
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