Abstract

The work referred to this document was carried out to study the influence of the process parameters on the mechanical properties of aluminum plates (AA 5754-H111) with a thickness of 6 mm, welded by means of Friction Stir Welding. The analysis which were carried out, involved the process parameters such as the welding tool rotation speed and the welding tool travel speed. The process was monitored during each test through thermocouples and infrared cameras. The thermal fields which were detected during the process of FSW have provided important information about the temperatures distributions for each combination of assigned process parameters. The most significant observations concerned the thermal non uniformity recorded along the length of all the welded joints and the asymmetries in terms of the maximum temperatures reached between the two sides of the weld. The most interesting observations showed an asymmetric temperature due to FSW process between the advancing side and the retreating side. In particular it has been observed that higher temperatures are always been recorded along the retreating side compared to advancing side. These results proved that the thermographic techniques could be a very useful tool to monitor the many variables that come into play in the process of FSW. In addition, tests conducted on static mechanical joints previously monitored, showed a non-uniform distribution of the mechanical characteristics also along the welding direction. These evaluations have led to say that, based on the process parameters chosen and the set-up of the equipment employed, the process could not be considered to be "stationary". Considering these results, it has been hypothesized that there was a link between the variation of the thermal properties and the mechanical properties non-uniformity of the same joints, along the welding direction. Finally, through the development of the ANOVA, was demonstrated a significant influence of the used process parameters, on the mechanical characteristics.

Autore Pugliese

• Galietti Umberto

Tutti gli autori

• Serio L M , De Filippis , L.A.C. , Palumbo , D. , Galietti U , Ludovico , A.D.

Titolo volume/Rivista

RIVISTA ITALIANA DELLA SALDATURA

Anno di pubblicazione

2014

ISSN

0035-6794

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

4

Ultimo Aggiornamento Citazioni

2017-04-22 03:20:59

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile