Effect of shoulder diameter on microstructure of dissimilar Al alloys friction stir welding joint

Jin Zhang, Pengfei Ji, Jun Zhou, Yong Lian

Research output: Contribution to journalArticlepeer-review

Abstract

Dissimilar 5083/6082 Al alloys friction stir welding (FSW) joint was experimentally investigated. Effects of the shoulder diameter on the cross section morphology, microstructure and microhardness are mainly discussed. The welded zone of FSW joint is characterized with fine and equiaxed grains. With the increase of shoulder diameter, the cross section of weld zone perpendicular to the weld is enlarged and all the grains size of the welded zone, heat affected zone and thermo-mechanically affected zone increases. The dynamic recrystallization happens in thermo-mechanically affected zone of 5083 Al alloy at advancing side, which is different to the 6082 Al alloy at retreating side. The microhardness distribution presents a W shape and the minimum value locates at the heat affected zone. The result of microhardness agrees with the cross-section morphology of the welded zone.

Original languageEnglish (US)
Pages (from-to)51-54
Number of pages4
JournalHanjie Xuebao/Transactions of the China Welding Institution
Volume37
Issue number11
StatePublished - Nov 25 2016

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

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