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Analysis of the stress raising action of flaws in laser clad deposits
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0002-3569-6795
Tampere University of Technology, Department of Materials Science, FI-33101 Tampere, Finland.
Tampere University of Technology, Department of Materials Science, FI-33101 Tampere, Finland.
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2013 (English)In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 46, p. 328-337Article in journal (Refereed) Published
Abstract [en]

Fatigue cracking of laser clad cylindrical and square section bars depends upon a variety of factors. This paper presents Finite Element Analysis (FEA) of the different macro stress fields generated as well as stress raisers created by laser cladding defects for four different fatigue load conditions. As important as the defect types are their locations and orientations, categorized into zero-, one- and two-dimensional defects. Pores and inclusions become critical close to surfaces. The performance of as-clad surfaces can be governed by the sharpness of surface notches and planar defects like hot cracks or lack-of-fusion (LOF) are most critical if oriented vertically, transverse to the bar axis. The combination of the macro stress field with the defect type and its position and orientation determines whether it is the most critical stress raiser. Based on calculated cases, quantitative and qualitative charts were developed as guidelines to visualize the trends of different combinations.

Place, publisher, year, edition, pages
2013. Vol. 46, p. 328-337
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
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URN: urn:nbn:se:ltu:diva-15058DOI: 10.1016/j.matdes.2012.10.010ISI: 000314870000039Scopus ID: 2-s2.0-84870200218Local ID: e85922ec-e14e-4811-8dc5-c1591db55377OAI: oai:DiVA.org:ltu-15058DiVA, id: diva2:988031
Note

Validerad; 2013; 20121025 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2023-09-14Bibliographically approved

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Alam, Md. MinhajKaplan, Alexander F. H.

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