The effect of holding temperature on the strength of the diffusion bond of Ti-alloy and stainless steel through the ultrafine-grained interlayers of Ni and Ni-2%Cr alloy

Open School-Conference of NIS Countries Ultrafine Grained and Nanostructured Materials

Khazgaliev, R.G.^1 ; Ibragimova, I.I.^2 ; Imayev, M.F.^1,3 ; Mukhametrakhimov, M.K.^1 ; Mulyukov, R.R.^1,3

Institute for Metals Superplasticity Problems, Russian Academy of Sciences, Ufa, Russia^1

Ufa State Aviation Technical University, Ufa, Russia^2

Bashkir State University, Ufa, Russia^3

关键词: Chromium doping;    Holding temperatures;    Maximum strength;    Ni interlayers;    Nickel interlayer;    Pressure ranges;    Temperature range;    Ultra-fine-grained;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/447/1/012051/pdf
DOI  :  10.1088/1757-899X/447/1/012051

来源: IOP

【 摘 要 】

The manuscript considers the effect of diffusion bonding pressure, as well as holding at different temperatures, on the strength of the joints between titanium alloy and stainless steel, formed by diffusion bonding through ultrafine-grained interlayers of Ni and the Ni-2%Cr alloy. In samples with an interlayer of nickel after holding at 25 °C, the maximum strength of 380 MPa is achieved after diffusion bonding in the pressure range of 4-8 MPa. In samples with an interlayer of Ni-2%Cr, after holding at 25 °C, the highest strength of 490 MPa is achieved after bonding at a pressure of 12 MPa at 700 °C for 20 minutes. In the case of Ni-2%Cr interlayer, the strength of the joint falls more slowly than in the case of Ni interlayer. The mechanical properties of the joints are discussed in terms of the effect of chromium doping of nickel interlayer on the temperature range of transformation of austenite to martensite of the formed TiNi intermetallic compound.