Journal of Materials Engineering and Performance

, Volume 22, Issue 10, pp 3005–3013 | Cite as

Effect of Tool Pin Insertion Depth on Friction Stir Lap Welding of Aluminum to Stainless Steel

  • Yanni Wei
  • Jinglong Li
  • Jiangtao Xiong
  • Fusheng Zhang
Article
First Online:
Received:
Revised:

Abstract

Aluminum (1060Al) and stainless steel (SUS321, austenitic) were friction stir lap welded using a stir tool consisting of a cutting pin and a concave shoulder. Two welding processes characterized by plunge depth of the pin were designed. In process 1, the pin remains inside the Al metal and the pin tip approaches the stainless steel surface, while in process 2, the pin tip penetrates through the Al metal and was inserted into the stainless steel to generate a machining process. Morphological and compositional characterization of the joint revealed defect-free joining at the interface with a visible mixed layer corresponding to the possible phase FeAl3 and the solution of Fe in Al, resulting in high tensile strength of up to 89 MPa in process 2, while in process 1, the tensile strength was up to 71 MPa.

Keywords

aluminum alloy friction stir welding joints interfacial morphology microstructure SUS 321 stainless steel tensile strength 
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Notes

Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Grant No. 51071123) and the fund of the State Key Laboratory of Solidification Processing in NWPU (Grant Nos. 43-QP-2009 and 31-TP-2009) and 111 Project (B08040).

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Copyright information

© ASM International 2013

Authors and Affiliations

  • Yanni Wei
    • 1
    • 2
  • Jinglong Li
    • 2
  • Jiangtao Xiong
    • 1
    • 2
  • Fusheng Zhang
    • 2
  1. 1.State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’anPeople’s Republic of China
  2. 2.Shaanxi Key Laboratory of Friction Welding TechnologiesNorthwestern Polytechnical UniversityXi’anPeople’s Republic of China

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