Assessment of the advantages of static shoulder FSW for joining aluminium aerospace alloys

Hao Wu, Ying Chun Chen, David Strong, Phil Prangnell

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

Stationary (or Static) Shoulder Friction Stir Welding (SS-FSW) is a variant of FSW that was developed primarily to improve the weldability of titanium alloys by reducing the through thickness temperature gradient. Surprisingly, SS-FSW has been largely ignored by the Al welding community because it is widely supposed a rotating shoulder is an essential aspect of the process and that the higher conductivity means the surface heating effect of the shoulder is generally beneficial. In the work presented it is shown that SS-FSW has major advantages when welding high strength aluminium alloys; including a reduction in the heat input, a massive improvement in surface quality, and a narrower and more symmetric temperature distribution, which leads to narrower welds with a reduced heat affected zone width and lower distortion. The reasons for these benefits are discussed based on a systematic study aimed at directly comparing both processes.

Original languageEnglish
Title of host publicationTHERMEC 2013
EditorsB. Mishra, Mihail. Ionescu, T. Chandra
PublisherTrans Tech Publications Ltd
Pages1770-1775
Number of pages6
ISBN (Print)9783038350736
DOIs
Publication statusPublished - 2014
Event8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013 - Las Vegas, NV, United States
Duration: 2 Dec 20136 Dec 2013

Publication series

NameMaterials Science Forum
Volume783-786
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013
CountryUnited States
CityLas Vegas, NV
Period2/12/136/12/13

Keywords

  • AA7050
  • Distortion
  • Friction stir welding
  • Stationary shoulder
  • Thermal modelling

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