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Surface residual stresses in multipass welds produced using low transformation temperature filler alloys
University of Cambridge.
Unversity of Cambridge.
University West, Department of Engineering Science, Research Enviroment Production Technology West. (PTW, Welding technology)ORCID iD: 0000-0001-8822-2705
Canadian Neutron Beam Centre, Chalk River Laboratories, Chalk River, Ont. K0J 1J0, Canada.
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2014 (English)In: Science and technology of welding and joining, ISSN 1362-1718, E-ISSN 1743-2936, ISSN 1362-1718, Vol. 19, no 7, 623-630 p.Article in journal (Refereed) Published
Abstract [en]

Tensile residual stresses at the surface of welded components are known to compromise fatigue resistance through the accelerated initiation of microcracks, especially at the weld toe. Inducement of compression in these regions is a common technique employed to enhance fatigue performance. Transformation plasticity has been established as a viable method to generate such compressive residual stresses in steel welds and exploits the phase transformation in welding filler alloys that transform at low temperature to compensate for accumulated thermal contraction strains. Neutron and X-ray diffraction have been used to determine the stress profiles that exist across the surface of plates welded with low transformation temperature welding alloys, with a particular focus on the stress at the weld toe. For the first time, near surface neutron diffraction data have shown the extent of local stress variation at the critical, fusion boundary location. Compression was evident for the three measurement orientations at the fusion boundaries. Compressive longitudinal residual stresses and tensile transverse stresses were measured in the weld metal.

Place, publisher, year, edition, pages
Maney Publishing, 2014. Vol. 19, no 7, 623-630 p.
Keyword [en]
Transformation induced plasticity, martensite, residual stress, welding, neutron, X-ray diffraction
National Category
Metallurgy and Metallic Materials Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-6660DOI: 10.1179/1362171814Y.0000000234ISI: 000346152500013Scopus ID: 2-s2.0-84919423879OAI: oai:DiVA.org:hv-6660DiVA: diva2:746846
Available from: 2014-09-15 Created: 2014-09-15 Last updated: 2016-02-10Bibliographically approved

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CiteExportLink to record
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