Author:
Rapaka Ram,de Lima Lessa Cleber Rodrigo,Vieira Braga Lemos Guilherme,Pacheco Figueiredo Arlan,Vicharapu Buchibabu,Clarke Thomas,De Amitava
Abstract
AbstractFriction taper stitch welding (FTSW) is a novel technique that uses multiple inserts to conceal surface crack in a given substrate. The inserts are rotated and forced to fill the crack as plasticized material, and forge with the substrate in solid-state. The process is well suited for alloys such as duplex stainless steel, which suffers degradation of properties during fusion welding. A detailed experimental and theoretical investigation is presented here on FTSW of a duplex stainless steel (DSS). The experimental results show the presence of a ferrite-rich phase along the interface. The results computed by the numerical process model reveal a direct influence of thermal cycle in the amount of ferrite along the joint interface. The welded joint shows near homogeneous structure and properties similar to those of the substrate.
Publisher
Springer Science and Business Media LLC
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