Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Experimental Research and Numerical Modelling of the Cold Forming Process of the Inconel 625 Alloy Sheets Using Flexible Punch

Maciej Balcerzak
,
Krzysztof Żaba
* ORCID logo ,
Marcin Hojny
ORCID logo ,
Sandra Puchlerska
,
Łukasz Kuczek
,
Tomasz Trzepieciński
ORCID logo ,
Vit Novák
ORCID logo
Version 1 : Received: 19 November 2023 / Approved: 21 November 2023 / Online: 21 November 2023 (10:48:35 CET)

A peer-reviewed article of this Preprint also exists.

Balcerzak, M.; Żaba, K.; Hojny, M.; Puchlerska, S.; Kuczek, Ł.; Trzepieciński, T.; Novák, V. Experimental Research and Numerical Modelling of the Cold Forming Process of the Inconel 625 Alloy Sheets Using Flexible Punch. Materials 2024, 17, 85. Balcerzak, M.; Żaba, K.; Hojny, M.; Puchlerska, S.; Kuczek, Ł.; Trzepieciński, T.; Novák, V. Experimental Research and Numerical Modelling of the Cold Forming Process of the Inconel 625 Alloy Sheets Using Flexible Punch. Materials 2024, 17, 85.

Abstract

The paper presents the numerical and experimental results of research aimed at determining the influence of hardness in the range of 50-90 Shore A of layered tools made of elastomeric materials on the possibility of forming Inconel 625 nickel-based alloy sheets. A stamping die made of 90MnCrV8 steel (hardness 60HRC) was designed for forming embosses in drawpieces, ensuring various stress states on the cross-section of the formed element. The principle of operating the stamping die was based on the Guerin method. Finite element-based numerical modelling of the forming process for various configurations of polyurethane inserts was also carried out. The drawpieces obtained by sheet forming were subjected to geometry tests using optical 3D scanning. The results confirm that in the case of forming difficult-to-deform Inconel 625 Ni-based alloy sheets, the hardness of the polyurethane inserts significantly affects the geometric quality of the obtained drawpieces. The assumptions made in numerical simulations were verified in experimental studies. Based on the test results, it was concluded that the selection of polyurethane hardness should be determined by the shape of the formed element. Significant non-uniform sheet metal deformation was also found, which may pose a problem in the process of designing forming tools and technology of plastic forming of Inconel 625 Ni-based alloy sheets.

Keywords

elastomeric materials; finite element method; Inconel 625; nickel alloys; sheet metal forming

Subject

Engineering, Aerospace Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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