Stress distribution near the diffusion bonding interface of Fe3Al and Cr18-Ni8 stainless steel

Abstract

The stress distribution of Fe3Al/Cr18-Ni8 stainless steel diffusion bonding joint was calculated, the method of numerical simulation and thermo-elastic-plastic finite element method (FEM) were adopted. The results indicated that the stress peak value appeared near the interface of Cr18-Ni8 steel side. This is the key factor inducing crack. With increasing of the heating temperature and time, the stress of Fe3Al/Cr18-Ni8 diffusion bonding joint increased. The largest stress value with a heating temperature of 1100 • C is about 65.9 MPa, which is higher than the stress peak value at 1000 • C by 9.4 %. For a certain arrangement of thickness, the stress is becoming larger with the increasing of the thickness of test plate. When the thickness is beyond a certain critical value (about 8 mm), the stress varies slightly with the thickness. K e y w o r d s: Fe3Al intermetallic, dissimilar materials, diffusion bonding, stress finite element method (FEM)

Microstructure and mechanical properties of laser indirect brazed titanium/steel composite joint with a CuZn filler metal

“…Combined with Fick's second law Bhanumurthy et al [19], the mathematical model of references Xia [20] and William [21], the error function solution of the diffusion equation of Fe and Ti under unsteady conditions is obtained. According to the literature [22-24] and EDS measured results to establish two interface element concentration distribution (Equation (7)).…”

A method for producing ceramic/stainless steel composites by laser welding with calculation optimisation

“…From the empirical formula of diffusion temperature [22], it can be seen that diffusion reaction will occur in the joint. Combined with Fick's second law [23][24][25], the mathematical model of references [26,27] and Li et al [28][29][30], the error function solution of the diffusion equation of Fe and Ti under unsteady conditions was obtained. According to the literature [31][32][33] and EDS measured results to establish two interface element concentration distribution Equation (7).…”