Induction welding and heat treatment of steel pipes: evolution of crystallographic texture detrimental to toughness

Authors: Yan, P.¹; Guüngör, Ö. E.²; Thibaux, P.²; Bhadeshia, H. K. D. H.¹

Source: Science and Technology of Welding & Joining, Volume 15, Number 2, February 2010 , pp. 137-141(5)

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Abstract:

Steel welding using induction heating to produce pipelines is found to have lower toughness at the weld junction than the base material, even after a heat treatment which reaustenitises the weld zone. Detailed crystallographic characterisation indicates that the poor toughness is due to the crystallographically coarse grains present after welding; the coarse scale is not visible using just optical microscopy. The post-weld heat treatment does not improve the situation at the weld junction, because the detrimental crystallographic characteristics are reproduced on cooling.

Keywords: CRYSTALLOGRAPHY; INDUCTION WELDING; STEEL; PIPELINE; TOUGHNESS

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/136217109X12568132624163

Affiliations: 1: Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, UK 2: ArcelorMittal R&D Industry Gent, OCAS NV, Pres. J. F. Kennedylaan 3, BE-9060 Zelzate, Belgium

Publication date: 2010-02-01

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