Main Issues in Quality of Friction Stir Welding Joints of Aluminum Alloy and Steel Sheets
Joining of aluminum alloys through friction stir welding (FSW) is effectively employed in several industries (e.g., aeronautics and aerospace) since it guarantees proper weld strength as compared to other joining technologies. Contrarily, dissimilar FSW of aluminum alloys and steels often poses impo...
Main Authors: | , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2019-05-01
|
Series: | Metals |
Subjects: | |
Online Access: | https://www.mdpi.com/2075-4701/9/5/610 |
id |
doaj-c97fc0bbf3c04df59f44d6ba7280f930 |
---|---|
record_format |
Article |
spelling |
doaj-c97fc0bbf3c04df59f44d6ba7280f9302020-11-25T02:01:44ZengMDPI AGMetals2075-47012019-05-019561010.3390/met9050610met9050610Main Issues in Quality of Friction Stir Welding Joints of Aluminum Alloy and Steel SheetsMian Wasif Safeen0Pasquale Russo Spena1Faculty of Science and Technology, Free University of Bozen-Bolzano, piazza Università 5, 39100 Bolzano, ItalyDepartment of Management and Production Engineering, Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Torino, ItalyJoining of aluminum alloys through friction stir welding (FSW) is effectively employed in several industries (e.g., aeronautics and aerospace) since it guarantees proper weld strength as compared to other joining technologies. Contrarily, dissimilar FSW of aluminum alloys and steels often poses important issues in the selection of welding parameters due to the difficulty to join different materials. Improper welding parameters give rise to the formation of intermetallic compounds, and internal and external defects (e.g., tunnel formation, voids, surface grooves, and flash). Intermetallic compounds are brittle precipitates of Al/Fe, which chiefly initiate crack nucleation, whereas internal and external defects mainly act as stress concentration factors. All these features significantly reduce joint strength under static and dynamic loading conditions. With reference to the literature, the influence of main welding parameters (rotational speed, welding speed, tool geometry, tilt angle, offset distance, and plunge depth) on the formation of intermetallic compounds and defects in FSW of aluminum alloys and steels is discussed here. Possible countermeasures to avoid or limit the above-mentioned issues are also summarily reported.https://www.mdpi.com/2075-4701/9/5/610friction stir weldingaluminum alloyssteelswelding parametersjoint qualityintermetallic compoundsdefects |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mian Wasif Safeen Pasquale Russo Spena |
spellingShingle |
Mian Wasif Safeen Pasquale Russo Spena Main Issues in Quality of Friction Stir Welding Joints of Aluminum Alloy and Steel Sheets Metals friction stir welding aluminum alloys steels welding parameters joint quality intermetallic compounds defects |
author_facet |
Mian Wasif Safeen Pasquale Russo Spena |
author_sort |
Mian Wasif Safeen |
title |
Main Issues in Quality of Friction Stir Welding Joints of Aluminum Alloy and Steel Sheets |
title_short |
Main Issues in Quality of Friction Stir Welding Joints of Aluminum Alloy and Steel Sheets |
title_full |
Main Issues in Quality of Friction Stir Welding Joints of Aluminum Alloy and Steel Sheets |
title_fullStr |
Main Issues in Quality of Friction Stir Welding Joints of Aluminum Alloy and Steel Sheets |
title_full_unstemmed |
Main Issues in Quality of Friction Stir Welding Joints of Aluminum Alloy and Steel Sheets |
title_sort |
main issues in quality of friction stir welding joints of aluminum alloy and steel sheets |
publisher |
MDPI AG |
series |
Metals |
issn |
2075-4701 |
publishDate |
2019-05-01 |
description |
Joining of aluminum alloys through friction stir welding (FSW) is effectively employed in several industries (e.g., aeronautics and aerospace) since it guarantees proper weld strength as compared to other joining technologies. Contrarily, dissimilar FSW of aluminum alloys and steels often poses important issues in the selection of welding parameters due to the difficulty to join different materials. Improper welding parameters give rise to the formation of intermetallic compounds, and internal and external defects (e.g., tunnel formation, voids, surface grooves, and flash). Intermetallic compounds are brittle precipitates of Al/Fe, which chiefly initiate crack nucleation, whereas internal and external defects mainly act as stress concentration factors. All these features significantly reduce joint strength under static and dynamic loading conditions. With reference to the literature, the influence of main welding parameters (rotational speed, welding speed, tool geometry, tilt angle, offset distance, and plunge depth) on the formation of intermetallic compounds and defects in FSW of aluminum alloys and steels is discussed here. Possible countermeasures to avoid or limit the above-mentioned issues are also summarily reported. |
topic |
friction stir welding aluminum alloys steels welding parameters joint quality intermetallic compounds defects |
url |
https://www.mdpi.com/2075-4701/9/5/610 |
work_keys_str_mv |
AT mianwasifsafeen mainissuesinqualityoffrictionstirweldingjointsofaluminumalloyandsteelsheets AT pasqualerussospena mainissuesinqualityoffrictionstirweldingjointsofaluminumalloyandsteelsheets |
_version_ |
1724956208437133312 |