Applicability of Bobbin Tool Friction Stir Welding for Dissimilar Al-Mg Joint

Harshadkumar H. Jadav, Vishvesh J. Badheka, Kishan Fuse, Kush Mehta, Gautam Upadhyay

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

Stringent material property demand for fuel economy in automobile and aerospace industry can be addressed only by either reducing weight or improving efficiency of the engine. Structural weight reduction requires dissimilar materials with varying thickness and geometry to be joined. Friction stir welding (FSW) is one of the latest additions to the joining processes. Bobbin tool friction stir welding (BTFSW) is a novel derivative of FSW process utilizing two shoulders for even heat distribution with advantage of eliminating backup support. This paper reports conventional FSW and feasibility trials of BTFSW for similar aluminum alloy (AA6061-T6), similar magnesium alloy (AZ31B) and dissimilar aluminum alloy (AA6061-T6) to magnesium alloy (AZ31B). Conventional FSW trials report successful welds without any observable surface defects. However, BTFSW weld surface presents defects like flash and groove, and material sticking to the tool pin is observed. Pin length, bigger diameter of the lower shoulder and flat surface of tool shoulder without chamfered edge are considered to be responsible for flash and groove defects. Process parameters which could have restricted joint formation are discussed. Though these feasibility trials of dissimilar aluminum and magnesium alloy BTFSW achieved limited success, it paves a path for successful joining using BTFSW.

Original languageEnglish
Title of host publicationLecture Notes in Intelligent Transportation and Infrastructure
Subtitle of host publicationProceedings of ICRAM 2020
EditorsAjit Kumar Parwani, PL. Ramkumar, Kumar Abhishek, Saurabh Kumar Yadav
PublisherSpringer Nature
Pages223-232
Number of pages10
ISBN (Electronic)9789813341760
ISBN (Print)9789813341753
DOIs
Publication statusPublished - 1 Mar 2021
Event2nd International Conference on Recent Advances in Mechanical Infrastructure - ICRAM 2020 : Recent Advances in Mechanical Infrastructure - Department of Mechanical Engineering, IITRAM, Ahmedabad, India
Duration: 21 Aug 202023 Aug 2020

Publication series

NameLecture Notes in Intelligent Transportation and Infrastructure
PublisherSpringer
VolumePart F1363
ISSN (Print)2523-3440
ISSN (Electronic)2523-3459

Conference

Conference2nd International Conference on Recent Advances in Mechanical Infrastructure - ICRAM 2020
Abbreviated titleICRAM 2020
Country/TerritoryIndia
CityAhmedabad
Period21/08/2023/08/20

Keywords

  • aluminum alloy
  • bobbin tool FSW
  • dissimilar welding
  • magnesium alloy
  • reducing weight
  • friction stir welding (FSW)
  • bobbin tool friction stir welding (BTFSW)

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