Application of the DIC System to Build a Forming Limit Diagram (FLD) of Multilayer Materials

• Published in: Key engineering materials 2022-07, Vol.926, p.963-969
• Main Authors: Muszka, Krzysztof, Majta, Janusz, Lisiecka-Graca, Paulina, Madej, Łukasz, Kwiecień, Marcin
• Format: Article
• Language: English
• Subjects: Cast iron; Correlation analysis; Deep drawing; Deformation analysis; Deformation mechanisms; Digital imaging; Erichsen test; Explosive welding; Forming limit diagrams; Impact analysis; Metal forming; Metal sheets; Military applications; Multilayers; Production methods; Titanium
• ISSN: 1013-9826; 1662-9795; 1662-9795
• DOI: 10.4028/p-s33fqx

The extraordinary combination of strength and ductility of multilayered materials makes them attractive in the various applications and industries (military, aerospace, energy industry etc.). In the present work, the investigated materials were joined into multilayered sheet using the explosive welding method. The three-layer material was made of two titanium sheets and one Armco iron sheet in between. Materials produced by explosive welding can easily be used in a simple deformation process, but more complex processes that employ a more complex mechanical state are still not sufficiently studied. The presented study analyzes the possibilities of using Ti - Armco - Ti sheet for the deep drawing process. For this purpose, the forming limit diagram (FLD) has been constructed and verified. FLD is one of the most important tools in the analysis of sheet metal forming processes. In the presented work the non-standard method (Erichsen test) coupled with Digital Image Correlation analysis was used. The obtained results confirmed that the method of producing the tested sheet and the morphology of the microstructure created have a direct impact on the deformation mechanisms.