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Stress raising in laser clad components depending on geometry and defects
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.
Tampere University of Technology, Department of Materials Science.
Tampere University of Technology, Department of Materials Science.
Tampere University of Technology, Department of Materials Science.
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2013 (English)In: 14th NOLAMP Conference: The 14th Nordic Laser Materials Processing Conference, August 26th – 28th 2013, Gothenburg, Sweden / [ed] Alexander Kaplan; Hans Engström, Luleå: Luleå tekniska universitet, 2013, 281-292 p.Conference paper (Other academic)
Abstract [en]

The fatigue life of laser clad components is basically determined by stress raisers, which arehere studied by Finite Element Analysis. Cylindrical and square section bars are compared foraxial, bending and torsional load conditions, which induces the macro-stress field withcorresponding stress peaks. Defects from laser cladding such as pores, cracks or the surfaceroughness superimpose additional stress raising action on this stress field. The geometricalposition and orientation of the defects has strong impact on the induced maximum stresslevel. For surface pores it is demonstrated by the fractography that their occurrence within acritical azimuthal range can initiate fatigue cracking. The different conditions of samplegeometry, load situations, materials and defects are compared and discussed. In particular,advanced illustration methods are applied for improved and generalized documentation andexplanation of the trends, both qualitatively and quantitatively. Guidelines are presented, inparticular emphasizing critical defects and situations, such as surface pores that are difficult todetect because of inclusions, or pores just underneath the surface that generate particularlyhigh stress.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2013. 281-292 p.
Research subject
Manufacturing Systems Engineering
URN: urn:nbn:se:ltu:diva-30429Local ID: 43aeeefb-8672-4f27-a0bb-607053b84640ISBN: 978-91-7439-688-1ISBN: 978-91-7439-689-8 (PDF)OAI: diva2:1003656
Nordic Laser Materials Processing Conference : 26/08/2013 - 28/08/2013
Godkänd; 2013; 20131210 (andbra)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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