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Case depth measurements on inductionhardened crankshafts by using ultrasonic backscattering method
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
2017 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Induction hardening is a complex process that requires regular verification of the case depth and the microstructure. Today this verification is done by destructive testing where a cross section is analysed. The case depth is measured by several Vickers hardness impressions and the microstructure is analysed by a light optic microscope.

This master thesis was performed in collaboration with Volvo GTO in Skövde, with the target to find out if an ultrasonic backscattering method is usable for analysing the case depths on induction hardened crankshafts. This was done by verifying the results provided by ultrasonic testing with the results provided by destructive testing. The measurements were done on several crankshafts with different case depths and steel composition.

The result, for crankshafts with normal case depths, shows a good correlation between the destructive testing (DT) and the ultrasonic testing (UT). The mean value for the discrepancy was 0.39 mm with a standard deviation of 0.20 mm. The reproducibility of the method has a standard deviation of 0.074 mm.

Place, publisher, year, edition, pages
2017. , p. 117
Series
UPTEC K, ISSN 1650-8297 ; 17012
Keywords [en]
Ultrasonic, Non Destructive Testing, Case Depth, Volvo
Keywords [sv]
Ultraljud, oförstörande provning, härddjup, Volvo
National Category
Other Materials Engineering Manufacturing, Surface and Joining Technology Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:uu:diva-325021OAI: oai:DiVA.org:uu-325021DiVA, id: diva2:1112950
External cooperation
Volvo GTO, Skövde
Subject / course
Material
Educational program
Master Programme in Chemical Engineering
Supervisors
Examiners
Available from: 2017-06-26 Created: 2017-06-21 Last updated: 2017-06-26Bibliographically approved

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Other Materials EngineeringManufacturing, Surface and Joining TechnologyMetallurgy and Metallic Materials

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CiteExportLink to record
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Citation style
  • apa
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