Study of forming defects and failure occurrence in the radial-axial rolling of super duplex stainless steel rings

Study of forming defects and failure occurrence in the radial-axial rolling of super duplex stainless steel rings

MURILLO-MARRODÁN Alberto, GARCÍA GIL Eduardo, FERNANDEZ-GAMBOA Unai, CONDE Aintzane, LOZARES Jokin

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Abstract. Welding neck flanges are commonly manufactured by radial-axial ring rolling (RARR). The service conditions of these elements are very demanding (mechanical loads and corrosive environments). For this reason, materials such as super duplex stainless steel (SDSS) are used, which could present workability problems under certain process conditions. In this work, a study of forming defects and failure occurrence in the RARR of SDSS flanges has been proposed. Firstly, a finite element model of the industrial RARR process was developed and validated. Then, a multivariate factorial analysis based on a virtual design of experiments was performed to identify the determinant parameters of the process. The diameter of the mandrel was identified as the most determinant parameter. An increase in diameter reduces the probability of developing underfilling defects and the development of cracks in the flange neck. The mandrel radial speed has no significant effect on the cracking of underfill defects while reducing the rotational speed of the king-roll could improve the uniformity of the deformation distribution in the flange section.

Keywords
Radial-Axial Ring Rolling, Super Duplex Stainless Steel, VDOE, Cracks, Fishtail

Published online 4/19/2023, 9 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: MURILLO-MARRODÁN Alberto, GARCÍA GIL Eduardo, FERNANDEZ-GAMBOA Unai, CONDE Aintzane, LOZARES Jokin, Study of forming defects and failure occurrence in the radial-axial rolling of super duplex stainless steel rings, Materials Research Proceedings, Vol. 28, pp 629-637, 2023

DOI: https://doi.org/10.21741/9781644902479-68

The article was published as article 68 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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