Non-destructive detection of lack of penetration defects in friction stir welds

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DOIResolve DOI: http://doi.org/10.1179/1362171812Y.0000000007
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TypeArticle
Journal titleScience and Technology of Welding & Joining
Volume17
Issue4
Pages295303; # of pages: 9
SubjectNon-destructive evaluation; Friction stir welding; Lack of penetration; Eddy current; Ultrasonic waves; Inspection
AbstractThis study focuses on the comparative investigation of different non-destructive inspection (NDI) techniques for detecting the lack of penetration discontinuities in butt joint friction stir (FS) welds. A variably sized lack of penetration has been introduced purposely by progressively changing the tool pin’s length. While inspecting the weld from the discontinuity side provides results of higher sensitivity, service inspection of the FS welded components requires evaluation of the welding tool’s side, opposite the defect containing one. Non-destructive techniques amenable for inspection from either the tool side or the far side of the weld are analysed, and results from inspection are presented for comparison. Subsequently, bending tests and metallographic examinations were employed to confirm the size of the lack of penetration defects and correlate these results with the NDI capabilities.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Aerospace Research; NRC Industrial Materials Institute
Peer reviewedYes
NRC number139269
NPARC number21059284
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Record identifierab7b86e4-e147-40b7-9d5c-aafb42b248da
Record created2012-12-03
Record modified2016-05-09
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