Název: Neutron diffraction analysis of residual strain/stress distribution in the vicinity of high strength welds
Autoři: Mráz, Ľ. ; Karlsson, L. ; Hamak, I. ; Vrána, Miroslav ; Mikula, Pavol
Typ dokumentu: Příspěvky z konference
Konference/Akce: 14th International Conference on Experimental Mechanics (ICEM14), Poitiers (FR), 20100704
Rok: 2010
Jazyk: eng
Abstrakt: Residual stresses resulting from non homogeneous heat distribution during welding process belong to most significant factor influencing behavior of welded structures. These stresses are responsible for defect occurrence during welding and they are also responsible for crack initiation and propagation at the either static or dynamic load. The significant effect of weld metal chemical composition as well as the effect of fatigue load and local plastic deformation on residual stress distribution and fatigue life have been recognized for high strength steels welds. The changes in residual stress distribution have then positive effect on cold cracking behavior and also on fatigue properties of the welds [1-3]. Several experimental methods, both destructive and non-destructive, such as hole drilling method, X-ray diffraction, neutron diffraction and others, have been used to examine residual stress distribution in all three significant orientations in the vicinity of the welds. The present contribution summarizes the results of neutron diffraction measurements of residual stress distribution in the vicinity of single-pass high-strength-steel welds having different chemical composition as well as the influence of fatigue load and local plastic deformation. It has been observed that the chemical composition of the weld metal has a significant influence on the stress distribution around the weld. Similarly, by aplying both cyclic load or pre-stress load on the specimens, stress relaxation was observed even in the region of approximately 40 mm far from the weld toe.
Klíčová slova: neutron diffraction; residual stress
Zdrojový dokument: EPJ Web of Conferences, ISSN 2100-014X

Instituce: Ústav jaderné fyziky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0281533

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-373397


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav jaderné fyziky
Konferenční materiály > Příspěvky z konference