The relationship between force-extension diagram and visual inspection on the EDGE cracking tendency of Dual Phase steels

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dc.contributor.authorArdalı, Refiye
dc.contributor.authorYıldırım, Ömer
dc.contributor.authorSahin, Kubilay
dc.contributor.authorSaray, Onur
dc.date.accessioned2026-02-12T21:02:48Z
dc.date.available2026-02-12T21:02:48Z
dc.date.issued2018
dc.departmentBursa Teknik Üniversitesi
dc.description27th International Conference on Metallurgy and Materials, METAL 2018 -- 2018-05-23 through 2018-05-25 -- Brno -- 142841
dc.description.abstractLight-weighting targets of the automotive sector requires to use of advanced high-strength steels (AHSS) with higher strength more extensively. However, as a common behavior, increasing strength levels of AHSS accompanied with decreasing ductility/formability levels. This behavior become more pronounced during secondary deformation of a blanked edge. To examine this concept, hole expanding (HE) test, that simulates the local formability of the edges after blanking operations, has been started to be widely used. In this study, deformation stages of the HE tests were examined by means of main characteristics and variations of F (force) - X (extension) curves and derivative of F with respect to the X (dF/dx) during the punch travel until cracking. In order to correlate variation in curve characteristics with deformation stages, high-resolution camera images of the tested samples concurrently collected during the whole test and main relationships between them were determined. Based on these relationships a new approach to predict "stop stroke" of the HE tests is proposed. Therefore, elimination of the visual inspection and decision making of an operator or an in-situ image processing software is aimed. Proposed approach was developed using DP600 steel with a thickness of 1.2 mm as a common steel grade that widely used in automotive industry. Also, validation of developed "stop stroke" criteria was tried in HE testing of thinner and thicker DP600 samples. Results showed that a good prediction of stop stroke can be achieved by using proposed approach. © 2018 TANGER Ltd., Ostrava.
dc.description.sponsorshipTürkiye Bilimsel ve Teknolojik Araştirma Kurumu, TÜBITAK, (3160912); Consejo Nacional para Investigaciones Científicas y Tecnológicas, CONICIT
dc.identifier.endpage297
dc.identifier.isbn9788087294840
dc.identifier.scopus2-s2.0-85059382264
dc.identifier.scopusqualityN/A
dc.identifier.startpage291
dc.identifier.urihttps://hdl.handle.net/20.500.12885/6546
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherTANGER Ltd.
dc.relation.ispartofMETAL 2018 - 27th International Conference on Metallurgy and Materials, Conference Proceedings
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanı
dc.snmzKA_Scopus_20260212
dc.subjectDual phase steels
dc.subjectEdge cracking
dc.subjectHole expansion
dc.subjectLocal formability
dc.titleThe relationship between force-extension diagram and visual inspection on the EDGE cracking tendency of Dual Phase steels
dc.typeConference Object

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