Interlayer engineering for dissimilar bonding of titanium to stainless steel

Strong bonding of titanium to stainless steel, even with strengths more than that of the base metal, is challenging, but has never been achieved owing to its inherent brittleness. Here we report a strong bonding of Ti Gr. 2 to STS by using engineered interlayer structure of V–Cr–Ni and Ti-base amorphous alloy filler. Under optimum conditions, the Ti(base)/Ti solid solution/V/Cr/Ni/STS(base) joints were reliably produced without any detrimental brittle phases, exhibiting a remarkably high strength exceeding that of the Ti Gr. 2.