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Dissimilar friction stir welding of duplex stainless steel to low alloy structural steel

Logan, B. P. and Toumpis, A. I. and Galloway, A. M. and McPherson, N. A. and Hambling, S. J. (2016) Dissimilar friction stir welding of duplex stainless steel to low alloy structural steel. Science and Technology of Welding and Joining, 21 (1). pp. 27-35. ISSN 1362-1718

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    Abstract

    In the present study, 6 mm nominal thickness dissimilar steel plates were joined using friction stir welding. The materials used were duplex stainless steel and low alloy structural steel. The weld was assessed by metallographic examination and mechanical testing (transverse tensile and fatigue). Microstructural examination identified four distinct weld zones and a substantially hard region within the stir zone at the base of the weld tool pin. Fatigue specimens demonstrated high level fatigue life and identified four distinct fracture modes.