Next Article in Journal
Application of the Flotation Tailings as an Alternative Material for an Acid Mine Drainage Remediation: A Case Study of the Extremely Acidic Lake Robule (Serbia)
Previous Article in Journal
Molecular Doping for Hole Transporting Materials in Hybrid Perovskite Solar Cells
Previous Article in Special Issue
Thermal Cycles and Deformation Characters During High-Speed Micro Friction Stir Welding Process of AA7075-T6 Sheets
Open AccessArticle

High-Speed Deformation of Pinless FSWed Thin Sheets in AA6082 Alloy

1
Dipartimento di Ingegneria Industriale e Scienze Matematiche (DIISM), Università Politecnica delle Marche, Via Brecce Bianche, 60100 Ancona, Italy
2
Università degli Studi eCampus, Via Isimabrdi 10, 22060 Novedrate (CO), Italy
*
Author to whom correspondence should be addressed.
Metals 2020, 10(1), 15; https://doi.org/10.3390/met10010015
Received: 18 November 2019 / Revised: 12 December 2019 / Accepted: 18 December 2019 / Published: 20 December 2019
The high-speed deformation behavior of friction stir-welded thin sheets in AA6082-T6 aluminum alloy, under biaxial balanced stretching, was investigated by means of a hemispherical punch test carried out using direct tension-compression Split Hopkinson Bar. The friction stir welding process was performed on thin sheet blanks using a pinless tool; the rotational and welding speeds were kept constant during process. The dynamic tests were carried out, with a punch speed of 4500 mm/s, at different punch stroke values until failure of the friction stir welded sample. It was seen that failure occurs along the welding line at a dome height about 11% higher than that at the onset of necking. Fractographic analysis shows that deformation is localized in the fracture zone. The results were compared with those obtained on friction stir welded blanks deformed under quasi-static condition in order to evaluate the influence of the loading rate on the weld deformation and fracture mechanisms. It was shown that joints deformed under dynamic loading condition are characterized by a dome height at the onset of necking significantly higher than the one measured under quasi-static condition. View Full-Text
Keywords: aluminum alloy; friction stir welding; pinless tool; high-speed deformation; Split Hopkinson bar; SEM fractography aluminum alloy; friction stir welding; pinless tool; high-speed deformation; Split Hopkinson bar; SEM fractography
Show Figures

Figure 1

MDPI and ACS Style

Forcellese, A.; Simoncini, M. High-Speed Deformation of Pinless FSWed Thin Sheets in AA6082 Alloy. Metals 2020, 10, 15.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop