Advanced numerical modelling of friction stir welded low alloy steel

Research output: Contribution to journalArticle

4 Citations (Scopus)
9 Downloads (Pure)

Abstract

The development of advanced joining processes such as friction stir welding (FSW) is necessary to maintain manufacturing competitiveness in any industrial nation. Substantial research that has been carried out on FSW of aluminium alloys has demonstrated considerable benefits; this has led to greater interest in FSW of steel and other high melting temperature alloys. In this context, numerical modelling can provide cost-effective development of steel FSW. Due to the limitations associated with the Johnson Cook model when employed in high melting temperature metals, a three-dimensional thermo-mechanical simulation of FSW featuring low alloy steel with previously generated experimental temperature dependant properties has been successfully solved in Abaqus/Explicit. Unlike any previous research in which either the workpiece is assumed as a high viscous body or the tool is modelled as a moving heating source, the Coupled Eulerian Lagrangian approach has been innovatively applied to model the FSW process on steel. All stages of FSW (plunge, dwell and traverse) have been modelled for slow and fast process parameters and their results compared with previous experimental work on the same grade of steel. In each model, the weld shape and weld surface flash were found to be in exceptionally close alignment with previous experimental results.
Original languageEnglish
Pages (from-to)625-636
Number of pages12
JournalJournal of Manufacturing Processes
Volume34
Issue numberPart A
Early online date13 Jul 2018
DOIs
Publication statusPublished - 31 Aug 2018

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Friction stir welding
High strength steel
Friction
Steel
Melting point
Welds
Numerical modeling
Welding
Joining
Aluminum alloys
Metals
Heating

Keywords

  • friction stir welding
  • finite element modelling
  • coupled Eulerian Lagrangian
  • DH36
  • flash formation
  • temperature distribution

Cite this

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title = "Advanced numerical modelling of friction stir welded low alloy steel",
abstract = "The development of advanced joining processes such as friction stir welding (FSW) is necessary to maintain manufacturing competitiveness in any industrial nation. Substantial research that has been carried out on FSW of aluminium alloys has demonstrated considerable benefits; this has led to greater interest in FSW of steel and other high melting temperature alloys. In this context, numerical modelling can provide cost-effective development of steel FSW. Due to the limitations associated with the Johnson Cook model when employed in high melting temperature metals, a three-dimensional thermo-mechanical simulation of FSW featuring low alloy steel with previously generated experimental temperature dependant properties has been successfully solved in Abaqus/Explicit. Unlike any previous research in which either the workpiece is assumed as a high viscous body or the tool is modelled as a moving heating source, the Coupled Eulerian Lagrangian approach has been innovatively applied to model the FSW process on steel. All stages of FSW (plunge, dwell and traverse) have been modelled for slow and fast process parameters and their results compared with previous experimental work on the same grade of steel. In each model, the weld shape and weld surface flash were found to be in exceptionally close alignment with previous experimental results.",
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author = "Bilal Ahmad and Alexander Galloway and Athanasios Toumpis",
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Advanced numerical modelling of friction stir welded low alloy steel. / Ahmad, Bilal; Galloway, Alexander; Toumpis, Athanasios.

In: Journal of Manufacturing Processes, Vol. 34, No. Part A, 31.08.2018, p. 625-636.

Research output: Contribution to journalArticle

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