On the utilization of radial extrusion to characterize fracture forming limits. Part I – methodology and tooling

On the utilization of radial extrusion to characterize fracture forming limits. Part I – methodology and tooling

Rui F.V. Sampaio, João P.M. Pragana, Ivo M.F. Bragança, Carlos M.A. Silva, Chris V. Nielsen, Paulo A.F. Martins

Abstract. This paper and its second part introduce a new formability test based on double-action radial extrusion to characterize material formability in the bulk-to-sheet material flow transitions that are commonly found in metal forming. This first part draws from the presentation of a multidirectional tool, which was designed to convert the vertical press stroke into horizontal movement of the extrusion punches towards each other, to aspects of experimental strain determination, fractography and finite element analysis. The methodology and tooling that are introduced here pave the way for subsequent testing and modelling of the different modes of fracture in three-dimensional to plane-stress evolutions, typical of bulk-to-sheet material flow transitions, by means of the new proposed test.

Keywords
Forming, Failure, Stress State Transitions

Published online 3/17/2023, 8 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Rui F.V. Sampaio, João P.M. Pragana, Ivo M.F. Bragança, Carlos M.A. Silva, Chris V. Nielsen, Paulo A.F. Martins, On the utilization of radial extrusion to characterize fracture forming limits. Part I – methodology and tooling, Materials Research Proceedings, Vol. 25, pp 229-236, 2023

DOI: https://doi.org/10.21741/9781644902417-29

The article was published as article 29 of the book Sheet Metal 2023

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. 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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