Effects of Interlayer on the Microstructure and Mechanical Properties of Resistance Spot Welded Titanium/Steel Joints: A Short Review

In this paper, the influence of interlayer on titanium/steel dissimilar metal resistance spot welding is reviewed from the aspects of macroscopic characteristics, microstructure and interface bonding properties of the joint. Previous studies have demonstrated that TiC, FeTi and Fe2Ti intermetallic c...

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Bibliographic Details
Published in:Metals (Basel ) 2024-04, Vol.14 (4), p.429
Main Authors: Liu, Yibo, Zhang, Chaoqun
Format: Article
Language:English
Subjects:
Alloys
Analysis
Bonded joints
Brittleness
Copper
Corrosion resistance
Crystal structure
Deformation
Dissimilar material joining
Electrodes
interlayer
Interlayers
Intermetallic compounds
Iron
Mechanical properties
Microstructure
Nickel base alloys
Nickel compounds
Residual stress
Resistance spot welding
Shear strength
Solid solutions
Steel
Titanium
Titanium carbide
titanium/steel dissimilar welding
Welded joints
Welding
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Summary:In this paper, the influence of interlayer on titanium/steel dissimilar metal resistance spot welding is reviewed from the aspects of macroscopic characteristics, microstructure and interface bonding properties of the joint. Previous studies have demonstrated that TiC, FeTi and Fe2Ti intermetallic compounds with high brittleness are formed in the joint during titanium/steel welding, which reduces the strength of the welded joint. Researchers proposed different interlayer materials, including Cu, Ni, Nb, Ta, 60%Ni-Cu alloy and BAg45CuZn. Firstly, adding an interlayer can weaken the diffusion of Fe and Ti. Secondly, the interlayer elements can combine with Fe or Ti to form solid solutions or intermetallic compounds with lower brittleness than Fe–Ti compounds. Finally, Cu, Ni, Ag, etc. with excellent ductility can effectively decrease the generation of internal stress, which reduces the formation of defects to improve the strength of the joint.
ISSN:2075-4701
2075-4701
DOI:10.3390/met14040429