Abstract

Friction 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.

Details

Title
Friction taper stitch welding of a duplex stainless steel
Author
Rapaka, Ram 1 ; de Lima Lessa, Cleber Rodrigo 2 ; Vieira Braga Lemos, Guilherme 3 ; Pacheco Figueiredo, Arlan 2 ; Vicharapu, Buchibabu 1 ; Clarke, Thomas 4 ; De, Amitava 5 

 Indian Institute of Technology Palakkad, Palakkad, India (GRID:grid.494639.5) (ISNI:0000 0004 6022 0646) 
 Federal Institute of Rio Grande do Sul (IFRS), Caxias do Sul, Brazil (GRID:grid.462197.f) (ISNI:0000 0004 0370 1902) 
 Federal University of Santa Maria (UFSM), Cachoeira do Sul, Brazil (GRID:grid.411239.c) (ISNI:0000 0001 2284 6531); Physical Metallurgy Laboratory (LAMEF) - PPGE3M/UFRGS, Porto Alegre, Brazil (GRID:grid.411239.c) 
 Physical Metallurgy Laboratory (LAMEF) - PPGE3M/UFRGS, Porto Alegre, Brazil (GRID:grid.494639.5) 
 Indian Institute of Technology Bombay, Mumbai, India (GRID:grid.417971.d) (ISNI:0000 0001 2198 7527) 
Pages
21354
Publication year
2023
Publication date
2023
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2897534774
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.