Structural and chemical evolution of super duplex stainless steel on activated tungsten inert gas welding process

2009 ◽  
Vol 14 (8) ◽  
pp. 681-690 ◽  
Author(s):  
A. Berthier ◽  
P. Paillard ◽  
F. Christien
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Chemical Evolution ◽  
Welding Process ◽  
Inert Gas ◽  
Super Duplex Stainless Steel ◽  
Tungsten Inert Gas Welding

Enhancing fatigue resistance of activated tungsten inert gas welded UNS S32750 super duplex stainless steel by optimizing its technological properties

2020 ◽  
pp. 1-11
Author(s):  
A. Arunmani ◽  
T. Senthilkumar
Keyword(s):  
Stainless Steel ◽  
Fatigue Life ◽  
Duplex Stainless Steel ◽  
Fatigue Resistance ◽  
Process Parameters ◽  
Gas Flow ◽  
Welding Process ◽  
Travel Speed ◽  
Inert Gas ◽  
Super Duplex Stainless Steel

In engineering industries and heavy manufacturing plants, fatigue life of joints plays a pivotal role in determining the overall life span of the welded joint. In this paper, an advanced fusion joining technique, namely activated tungsten inert gas welding, was used for joining UNS S32750 super duplex stainless steel, with ZnO as activation flux. For the enhancement of fatigue resistance of joints, important welding process parameters were fluctuated according to a developed central composite design model. Empirical relationships were developed between the process parameters and the fatigue strength of the joints, which was correlated with the number of cycles to failure (NCF). Using analysis of variance, the significance of the developed fatigue model was ascertained. Using response surface methodology, optimization of process parameters for enhancement of fatigue resistance was done. It was observed that at the optimized activated tungsten inert gas weld process parameters of travel speed of welding torch at 69.85 mm/min, weld current at 125.20 A, and shielding gas flow rate at 14.77 L/min, a high fatigue life of 7.66396 × 108 NCF was obtained and the model was validated to very high predictability. Microstructural variations in the fatigue-tested specimens were evaluated for identifying the grain modifications.

scholarly journals Corrosion Resistance of TIG Welded Joints of Stainless Steels

2017 ◽  
Vol 885 ◽  
pp. 190-195 ◽  
Author(s):  
Amanda Silveira Alcantara ◽  
Enikő Réka Fábián ◽  
Monika Furkó ◽  
Éva Fazakas ◽  
János Dobránszky ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Ferric Chloride ◽  
Stainless Steels ◽  
Welded Joints ◽  
Welding Process ◽  
Inert Gas ◽  
Tungsten Inert Gas Welding ◽  
Type Stainless Steel ◽  
Different Types

The aim of this work was to analyze the performance of joints made by TIG (Tungsten Inert Gas) welding process in austenitic and duplex stainless steels with special regards to their corrosion resistance. Three different types of stainless steel were butt welded with TIG method. Ferric-chloride test and electrochemical treatments revealed how does the TIG process affects the corrosion resistance depending upon the alloy used for welding the joint. This work focuses on the weldability of the 2304, 2404 and 304 type stainless steel heterogeneous welds.

scholarly journals Influence of MIG/MAG Welding Process on Mechanical and Pitting Corrosion Behaviors on the Super-Duplex Stainless Steel SAF 2507 Welded Joints

2018 ◽  
Vol 09 (02) ◽  
pp. 228-245 ◽  
Author(s):  
Bruno Leonardy S. Lopes ◽  
Samuel F. Rodrigues ◽  
Eden S. Silva ◽  
Gedeon S. Reis ◽  
Waldemir dos P. Martins ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Pitting Corrosion ◽  
Welded Joints ◽  
Welding Process ◽  
Mag Welding ◽  
Super Duplex Stainless Steel ◽  
Corrosion Behaviors
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