DataVXJournal of Laser ApplicationsPaper
journal article·2013-05-01Open access

Surface pore initiated fatigue failure in laser clad components

M. M. Alam, J. Powell, A. F. H. Kaplan, J. Tuominen, P. Vuoristo, J. Miettinen, J. Poutala, J. Näkki, J. Junkala, T. Peltola

Journal of Laser Applications· Volume 25· Issue 3
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Source abstract

Abstract

A laser clad and machined cylindrical structural steel rod was fatigue tested under four-point bending load. The resulting fracture could be tracked back to a spherical surface pore in the Co-based coating. Due to an oxide inclusion, the pore was not identified by dye penetrant inspection. Two circular buckling strain patterns that were detected beside the pore at the surfaces after fracture confirm local plastic deformation prior to crack initiation. In order to calculate the stress field around the surface pore, linear elastic finite element analysis was carried out. For four-point bending load, a surface pore generally exceeds the maximum stress of a smooth rod as long as the pore is located within an azimuthal angle of ±55°, which was the case for the presented as well as for another pore initiated sample.
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Research context

Metals & alloys

OpenAlex topics: Welding Techniques and Residual Stresses · Additive Manufacturing Materials and Processes · Hydrogen embrittlement and corrosion behaviors in metals

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Engineering Science and Mathematics , , SE-971 87 Luleå, Sweden

Luleå University of Technology , , SE-971 87 Luleå, Sweden

Department of Materials Science, Tampere University of Technology , FI-33101 Tampere, Finland

Department of Mechanics and Design , , FI-33101 Tampere, Finland

Tampere University of Technology , , FI-33101 Tampere, Finland

Department of Materials Science, Tampere University of Technology , FI-33101 Tampere, Finland and Technology Centre KETEK Ltd, FI-67100 Kokkola, Finland

Technology Centre KETEK Ltd , FI-67100 Kokkola, Finland

References (16)

Show source-provided references
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