Original title: Influence of Plastic Deformation on the Residual Stress Distribution and Fatigue Behaviour of High Strength Steels Welds
Authors: Mráz, Ľ. ; Karlsson, L. ; Hamak, I. ; Mikula, Pavol ; Vrána, Miroslav
Document type: Papers
Conference/Event: 1st International Workshop on In-situ Studies with Photons, Neurtrons and Electron Scattering, Berlin (DE), 20090901
Year: 2010
Language: eng
Abstract: The effects of plastic deformation and cyclic loading on residual stress distribution have been studied at welds in high strength 800 MPa steel. Effects of residual stress levels on fatigue life are also presented. Tensile loading was used to induce precisely controlled plastic deformation at weld toes. Residual stress distributions were measured by neutron diffraction. The influence of fatigue loading on the residual stress level was much smaller than that of plastic deformation. A large drop of residual stresses in the vicinity of the welds was recognised after local straining at the level of 2%. Stresses decreased with up to 550 MPa in the region around the weld toe. The effect of local plastic deformation on fatigue properties was also found to be significant. Fatigue strength more than doubled compared to the non-strained as-welded condition.
Keywords: neutron diffraction; residual stress
Host item entry: In-situ Studies with Photons, Neutrons and Electrons Scattering, ISBN 978-3-642-14793-7

Institution: Nuclear Physics Institute AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0281536

Permalink: http://www.nusl.cz/ntk/nusl-373398


The record appears in these collections:
Research > Institutes ASCR > Nuclear Physics Institute
Conference materials > Papers