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Effect of interpass temperature on residual stresses in multipass welds produced using low transformation temperature filler alloy
University of Cambridge.
Unversity of Cambridge.
University West, Department of Engineering Science, Division of Mechanical Engineering. (PTW, Welding technology)ORCID iD: 0000-0001-8822-2705
ISIS Facility, Rutherford Appleton Laboratory.
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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 1, 44-51 p.Article in journal (Refereed) Published
Abstract [en]

Weld filler alloys that exploit transformation plasticity through low austenite to martensite transformation temperatures offer an effective method of reducing residual stresses in strong steel welds. However, in multipass welds, the heat input from later weld passes may be insufficient to retransform prior welding passes, leading to the accumulation of thermally induced strains and elevated residual stresses. In this work, the residual stress distributions produced around arc welds fabricated with a martensitic weld filler alloy that transforms at a low temperature have been studied as a function of the number of passes deposited and the interpass temperature. It is found that when the interpass temperature is above the transformation temperature of the weld metal, the entire multipass weld transforms as a single entity, thus permitting the optimum exploitation of the transformation plasticity. In contrast, the deposition of new metal with a relatively low interpass temperature leads to increased residual stresses in the underlying layers, reducing or eliminating the beneficial stress states previously created.

Place, publisher, year, edition, pages
Maney Publishing, 2014. Vol. 19, no 1, 44-51 p.
Keyword [en]
Martensitic weld metal; Residual stress; Transformation induced plasticity; Welding phase transformation, Work-integrated learning, WIL
Keyword [sv]
AIL
National Category
Metallurgy and Metallic Materials Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering; Work Integrated Learning
Identifiers
URN: urn:nbn:se:hv:diva-5732DOI: 10.1179/1362171813Y.0000000162ISI: 000337134300008OAI: oai:DiVA.org:hv-5732DiVA: diva2:663819
Note

Appeared or available online: den 10 september 2013

Available from: 2013-11-13 Created: 2013-11-13 Last updated: 2016-02-10Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • vancouver
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Language
  • de-DE
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  • nn-NB
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