Abstract
The purpose of the present study was to investigate the texture in dissimilar medium carbon steels welded by rotary friction technique. The Electron Backscatter Diffraction (EBSD) technique was the main technique used to investigate the effect of welding on grain size and grain crystallographic orientation in the welded joint. Moreover, the effect of isothermal heat treatment at 600°C on welded joint has been studied knowing that this annealing allows to decrease the residual stresses. EBSD results revealed different subzones in welded joint. The texture in the weld is essentially composed of three components: Goss {110} , Rotated Cube {100} , and Rotated Goss {110} orientation. The heat treatments applied on welded material had a slight effect on texture and grain size.
Highlights
This Friction welding is a solid state welding method
The texture in the weld is essentially composed of three components: Goss {110} , Rotated Cube {100} , and Rotated Goss {110} orientation
Three main zones can be observed from the line contact: Welding zone (WZ), thermal mechanical affected zone (TMAZ) and heat affected zone (HAZ)
Summary
This Friction welding is a solid state welding method. This type of welding involves the union between a stationary and a rotating member, due to the friction heat generated while undergoing high normal forces at the interface, below the melting temperature, the welded joint is achieved [1] [2]. In the case of joining circular bars, including pipes, the rotary friction welding (RFW) method is used. This technology has a lot of advantages over other welding processes. The welded joint obtained by RFW is a structurally inhomogeneous zone, characterized by a wide spectrum of formed structures and stresses [6]
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