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Residual stress distributions at high strength steel welds prepared by low transformation temperature (LTT) and conventional welding consumables
Welding Research Institute - Industrial Institute SR, 832 59 Bratislava, Slovakia.
University West, Department of Engineering Science, Divison of Natural Sciences, Surveying and Mechanical Engineering. (PTW)ORCID iD: 0000-0001-8822-2705
Nuclear Physics Institute ASCR, v.v.i, 25068 Rez, Czech Republic .
Nuclear Physics Institute ASCR, v.v.i, 25068 Rez, Czech Republic .
2014 (English)In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 777, 40-45 p.Article in journal (Refereed) Published
Abstract [en]

Residual stress distributions in fillet welds in 8 mm 900 MPa steel have been mapped perpendicular and parallel to the weld line and also through the thickness in the vicinity of weld toe position. Measurements were carried out on four welds when two of them were performed with conventional and two with the so called LTT (low transformation temperature) filler materials. Both neutron and X-ray diffractions were used for determination of the residual stress distribution. Fatigue properties have also been evaluated for all test welds. Neutron diffraction measurements showed that the stress profiles perpendicular to the weld toe qualitatively did not depend on filler material type although the absolute stress levels differed. Trends were similar for positions 2, 4 and 6 millimetres below the surface for all three stress components; σx (direction perpendicular to the weld), σy (parallel to the weld) and σz (through the thickness). X-ray diffraction showed difference in residual stress level at the weld toe. Lower residual stress levels have been identified for LTT filler material when compared to the conventional consumable compositions. The effect of residual stress is discussed in relation to fatigue properties of all four welds. Remarkable higher fatigue strength has been measured for welds prepared by the LTT filler materials. © (2014) Trans Tech Publications, Switzerland.

Place, publisher, year, edition, pages
2014. Vol. 777, 40-45 p.
Keyword [en]
Fatigue properties, Fatigue strength, Filler materials, Low transformation temperatured, Low transformation-temperature, Neutron diffraction measurements, Steel welds, Welding consumables, Fatigue of materials, Fillers, Neutron diffraction, Residual stresses, Semiconducting bismuth compounds, Stress concentration, Synchrotron radiation, X ray diffraction, Welds
National Category
Metallurgy and Metallic Materials
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-6196DOI: 10.4028/www.scientific.net/MSF.777.40ISI: 000336006800008Scopus ID: 2-s2.0-84896849670OAI: oai:DiVA.org:hv-6196DiVA: diva2:716036
Conference
7th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation, MECA SENS 2013; Sydney, NSW; Australia; 10 September 2013 through 12 September 2013; Code 102949
Note

7th International Conference on Mechanical Stress Evaluation by Neutrons and Synchrotron Radiation, MECA SENS 2013; Sydney, NSW; Australia; 10 September 2013 through 12 September 2013; Code 102949

Available from: 2014-05-07 Created: 2014-04-30 Last updated: 2016-02-10Bibliographically approved

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