Sheared edge formability characterization of cold-rolled advanced high strength steels for automotive applicationsShow others and affiliations
2022 (English)In: IOP Conference Series: Materials Science and Engineering / [ed] Sandrine Thuillier, Vincent Grolleau, Hervé Laurent, Institute of Physics (IOP), 2022, Vol. 1238, article id 012029Conference paper, Published paper (Refereed)
Abstract [en]
Edge cracking has become a limiting factor in the use of some advanced high strength steels (AHSS) for high-performance automotive applications. This fact has motivated the development of a multitude of experimental tests for edge formability prediction over the last years. In this sense, the Hole Expansion Test (HET) according to ISO16630 has been established in the automotive industry as a standard procedure for edge cracking sensitivity ranking. However, whereas it may be useful for rapid material screening, the results are often not accurate and reliable enough. Consequently, alternative methods based on Digital Image Correlation (DIC) have been proposed aimed at improving the prediction of edge cracking occurrence during forming and obtaining useful strain data that can be implemented in forming simulations. This paper explores the applicability of different DIC-based methods, such as Half-Specimen Dome Tests, Sheared Edge Tensile Tests, and KWI hole expansion tests with a flat nosed punch, for characterizing the edge formability of three cold-rolled AHSS sheets. The results obtained from the different testing methods are compared and validated with a laboratory-scale demonstrator. Finally, the limitations and advantages of the different methods are discussed.
Place, publisher, year, edition, pages
Institute of Physics (IOP), 2022. Vol. 1238, article id 012029
Series
IOP Conference Series: Materials Science and Engineering, ISSN 1757-8981, E-ISSN 1757-899X
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-95363DOI: 10.1088/1757-899X/1238/1/012029ISI: 000894042400029OAI: oai:DiVA.org:ltu-95363DiVA, id: diva2:1729944
Conference
41 st International Deep-Drawing Research Group Conference (IDDRG 2022) June 6 - 10, 2022 Lorient, France
Note
Funder: Research Fund for Coal and Steel (847213-CuttingEdge4.0-RFCS-2018)
2023-01-232023-01-232023-01-23Bibliographically approved