Nd:YAG pulsed laser welding of TC4 Ti alloy to 301L stainless steel using Ta/V/Fe composite interlayer

•The possibility of two pass welding for Ti alloy-SS joint with Ta/V/Fe as composite interlayer was studied.•The unmelted V interlayer prevented the formation of brittle Ti-Fe intermetallics.•Microstructures and mechanical properties of joints were improved by adding Ta/V/Fe composite interlayer. Th...

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Bibliographic Details
Published in:Materials letters 2018-02, Vol.212, p.54-57
Main Authors: Zhang, Y., Sun, D.Q., Gu, X.Y., Duan, Z.Z., Li, H.M.
Format: Article
Language:English
Subjects:
Composite interlayer
Interlayers
Intermetallic compounds
Laser beam welding
Materials science
Microstructure
Neodymium lasers
Semiconductor lasers
Stainless steel
Stainless steels
Studies
SUS301L stainless steel
TC4 Ti alloy
Tensile strength
Titanium alloys
Titanium base alloys
Vanadium
Welding
YAG lasers
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Summary:•The possibility of two pass welding for Ti alloy-SS joint with Ta/V/Fe as composite interlayer was studied.•The unmelted V interlayer prevented the formation of brittle Ti-Fe intermetallics.•Microstructures and mechanical properties of joints were improved by adding Ta/V/Fe composite interlayer. The present article reports the feasibility of Nd:YAG laser welding of Ti alloy to stainless steel through composite layer Ta/V/Fe. The laser beam was focused on the centerline of Ta and Fe sheets respectively to ensure that V interlayer was not completely melted. Two pass welding was employed involving creation of a joint with two weld zones separated by remaining unmelted V. Composite interlayer Ta/V/Fe was used to prevent the formation of Ti-Fe intermetallics and improve microstructure and properties of the Ti alloy-SS joint. The joint fractured at the unmelted V with the tensile strength of 627 MPa.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2017.10.057