Friction stir blind riveting for joining dissimilar cast mg am60 and al alloy sheets

Junying Min, Jingjing Li, Blair E. Carlson, Yongqiang Li, James F. Quinn, Jianping Lin, Weiming Wang

Research output: Contribution to journalArticle

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Abstract

A new one-sided joining method, friction stirring blind riveting (FSBR) was successfully implemented to form lap-shear joints for dissimilar metals from pairs of 3.05€‰mm thick cast Mg AM60, rolled 1.5€‰mm thick Al AA6022, and extruded 3.15€‰mm thick Al AA6082 specimens. The concept of this process is riveting the two workpieces with reduced force under frictional heat and fastening the workpieces through blind riveting once the rivet is fully inserted. In this research, the process was experimentally analyzed and optimized for four joint combinations. It was demonstrated that switching the positions of Mg and Al alloy specimens has a significant effect on the process window and maximum tensile load of the joints. Three quality issues of the FSBR joints were observed and discussed. During tensile testing, the sheet closer to the rivet tail work-hardens due to tail forming process but has worse loading condition than the sheet closer to the rivet head. For AA6xxx sheets, precipitate hardening due to frictional heat is another strengthening mechanism in FSBR compared to the conventional riveting process, which leads to higher tensile loads in FSBR joints.

Original languageEnglish (US)
Article number2211807
JournalJournal of Manufacturing Science and Engineering, Transactions of the ASME
Volume137
Issue number5
DOIs
StatePublished - Oct 1 2015

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All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Mechanical Engineering
  • Computer Science Applications
  • Industrial and Manufacturing Engineering

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