Possibilities of using interlayers during diffusion welding of Ti Gr2 and AISI 316L

Jaromir Moravec,Iva Novakova,Tomasz Kik,D Stančeková,M Vaško,J Szabelski,A Sapietová,J Mrázik,N Čuboňová,V Tlach,A Rudawska

doi:10.1051/matecconf/201824401013

Jaromir Moravec, Iva Novakova + Show 9 more

Open Access

https://doi.org/10.1051/matecconf/201824401013

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Abstract

Joining of materials with different physical and mechanical properties is always very problematic. As one of the possibilities, there can be used method of joint creation in solid state - e.g. by the diffusion welding. With this method it is possible to joint very different materials - even metals with non-metals. Despite the unquestionable advantages of this method, there is necessary to take into account also its limits. Among of them, there is creation of brittle intermetallic phases on the boundary of materials. This occurs e.g. at creation heterogeneous joints between titanium and highly-alloyed austenitic steel. The major aim of this paper is to describe how it is possible to eliminate brittle intermetallic phases created on boundary between Ti Grade 2 and AISI 316L steel by using metal interlayers.

Highlights

Diffusion welding is fairly quite a new technology in the research field
Phenomenological diffusion theory deals with the overall balance of transport process in solid substance undertaken in the given conditions
Microscopic perspective is considered in the atomic diffusion theory

Summary

Introduction

Diffusion welding is fairly quite a new technology in the research field It has numerous applications in distinct areas such as aerospace, nuclear, automotive, electronics and sensor industries. Phenomenological diffusion theory deals with the overall balance of transport process in solid substance undertaken in the given conditions This theory takes into account only macroscopic perspective. The diffusion flux J [mol·m-2·s-1] of atoms per unit time and unit area in the direction of the x-axis is proportional to the concentration gradient. Diffusion processes are non-stationary ones, because diffusion processes are changing over time It can be deduced as relation called Fick’s second law (eq 2). When the atom moves in the grid, it creates a hole or vacancy in its node.[1,2]

Possibilities to joint Ti Gr2 and AISI 316L without interlayers

Possibilities to joint Ti Gr2 and AISI 316L by the interlayers

Findings

Conclusion