The effect of vibration during friction stir welding on corrosion behavior, mechanical properties, and machining characteristics of stir zone

Sajad Fouladi, Amir H. Ghasemi, Mahmoud Abbasi, Morteza Abedini, Amir Mahyar Khorasani, Ian Gibson* (Corresponding Author)

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    5 Citations (Scopus)
    28 Downloads (Pure)

    Abstract

    Different methods have been applied to refine various characteristics of the zone (or nugget) obtained by friction stir welding (FSW). In the current research, joining components are vibrated normal to the weld line during FSW to refine the zone microstructure. This process is described as friction stir vibration welding (FSVW). The effect of FSVW on mechanical properties, corrosion behavior, and machining characteristics of the zone are investigated. Al5052 alloy specimens are welded using FSW and FSVW processes and their different characteristics are compared and discussed. The results show that the strength and ductility of the welded parts increase when the vibration is applied. The outcomes also show that corrosion resistance of the nugget for FSV-welded specimens is lower than FS welded samples, and machining force of the former specimens is higher than the latter ones. These are related to smaller grain size in the zone of FSV-welded specimens compared to FS welded parts. Smaller grain size leads to a greater volume fraction of grain boundaries and, correspondingly, higher strength and hardness, as well as lower corrosion resistance.

    Original languageEnglish
    Article number421
    JournalMetals
    Volume7
    Issue number10
    DOIs
    Publication statusPublished - 1 Oct 2017

    Keywords

    • Corrosion resistance
    • Friction stir vibration welding
    • Friction stir welding
    • Machining
    • Mechanical properties

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