Friction stir welded T-joints optimization

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Ana C F Silva (Author) Other; Daniel F O Braga (Author) Other; de Figueiredo, MAV (Author) FEUP; Moreira, PMGP (Author) FEUP

Journal

Title: Materials and Design

Vol. 55

Pages: 120-127

ISSN: 0261-3069

Publisher: Elsevier Science

Indexing

ISI Web of Knowledge - 23 Citations

Scopus - 30 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-008-FRC

DOI: 10.1016/j.matdes.2013.09.016

Abstract (EN): The increasing use of aluminium alloys in transportation industry, such as railways, shipbuilding and aeronautics, promotes the development of more efficient and reliable welding processes. Friction stir welding (FSW) is a prominent solid-state joining technology that arose as a possible reliable welding solution. Optimized process parameters are not regularly used in previous studies found in the literature, in particular T-joints, which difficult the process industrial application. This study is focused on the optimization of friction stir welded T-joints using the Taguchi method. Mechanical tests of 27 different welded joints were carried out, and results were analysed using ANOVA, mean effect and response surface methodology (RSM). The tool rotational speed was verified to be the most influent factor in the joint mechanical properties, and is strongly dependent on the shoulder/probe diameters ratio. It was also shown that using 1000 rpm, 3.90 mm of probe depth and shoulder/probe diameters ratio of 2.5 (shoulder diameter of 15 mm) it may be achieved improved joint strength. For the optimized parameters it was verified that the welding speed does not have a significant influence. Equations to predict the joints mechanical properties were also derived through multiple regression.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8