scholarly journals Modeling of Bending Properties of Stainless Steel 304 Sheets Welded by Tungsten Inert Gas Welding Process

2019 ◽  
Vol 15 (4) ◽  
pp. 10-22
Author(s):  
Ali Hussein Alwan
Keyword(s):  
Stainless Steel ◽  
Welded Joints ◽  
Gas Pressure ◽  
Inert Gas ◽  
Welding Parameters ◽  
Tungsten Inert Gas Welding ◽  
Bending Properties ◽  
Argon Gas ◽  
Bending Force ◽  
Stainless Steel 304

In this research, the effects of both current and argon gas pressure on the bending properties of welded joints were studied. Using the possible ranges of welding gas pressures and currents, Tungsten inert gas welding (TIG) of stainless steel (304) sheet was used to obtain their influence on the maximum bending force of the (TIG) welded joints. Design of experiment (DOE) ‘version 10' was used to determine the design matrix of experiments depending on the used levels of the input factors. Response surface methodology (RSM) technique was used to obtain an empirical mathematical model for the maximum bending force as a function of welding parameters (Current and Argon gas pressure). Also, the analysis of variance (ANOVA) was used to verify the adequacy of the resulted model statistically.  

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.

Experimental Investigations for Reducing Effect of Sensitization in Tungsten Inert Gas Welding

2008 ◽  
Author(s):  
Rupinder Singh ◽  
Sehijpal Singh
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Inert Gas ◽  
Experimental Investigations ◽  
Welding Parameters ◽  
Work Piece ◽  
Tungsten Inert Gas Welding ◽  
Stainless Steel 316L

Stainless steels are considered to have very good resistance to general and localized corrosion due to their chromium content. This property of corrosion resistance constitutes the main criterion for selecting austenitic grades of steels for service in the chemical, nuclear and aerospace industries although their mechanical properties are relatively modest. However, this resistance can degrade when structural components manufactured from these steels are used in a chemically aggressive environment, especially when service involves exposure to high temperatures like in welding. This exposure gives rise to precipitation of chromium carbides producing chromium depletion at grain boundaries that brings about the inter-granular corrosion or sensitization of these materials. Austenitic stainless steel (316L) is one of the corrosion resistance material used extensively in the oil production, chemical and power generation industries for transportation and reservoir of corrosive products. In spite of its corrosion resistance property there exist severe problems of sensitization. In the present work an effort has been made to reduce the effect of sensitization in Tungsten Inert Gas welding of Austenitic stainless steel (316L). Three welding procedures (namely conventional, back step and skip welding) in Tungsten Inert Gas welding have been used to control exposure time of the weld pool to higher temperatures, in order to study the effect of sensitization on mechanical properties (such as tensile strength, yield strength, percentage elongation and hardness). The results of this study suggested that the better mechanical properties were attained by the skip welding procedure and recommended welding parameters are 90 Amp current and 10 L/min of gas flow rate for a 5 mm thick work piece. Noticeable change in amount/extent of sensitization was observed using a scanning electron microscope (SEM) analysis within the various welding specimens prepared using the various procedures. Further mechanical properties (like strength and hardness) have been correlated with the extent of sensitization, which show remarkable decreases when the amount/extent of sensitization increases.

scholarly journals Pengaruh Variasi Arus Pengelasan dan Debit Aliran Gas Pelindung Terhadap Kekuatan Tarik Stainless Steel 304 pada Proses Las GTAW

2020 ◽  
Vol 2 (2) ◽  
pp. 153
Author(s):  
Ahmad Saefudin
Keyword(s):  
Stainless Steel ◽  
Inert Gas ◽  
Stainless Steel 304

Tujuan dari penelitian ini untuk mengetahui kekuatan tarik stainless steel 304 dari pengelasan GTAW dengan variasi kuat arus dan debit aliran gas. Metode penelitian yang digunakan adalah penelitian eksperimental dengan variasi kuat arus 80A, 90A dan 100A dan debit aliran gas pelindung sebesar 8 L/menit dan 10 L/menit. Sampel untuk pengujian menggunakan standar uji ASTM E8/E8M-09. Hasil analisis statistik kuat arus menunjukkan  bahwa nilai signifikansi sebesar 0.032 lebih kecil dari 0,05, atau H0 ditolak artinya  penggunaan variasi kuat arus berpengaruh terhadap kekuatan tarik. Sedangkan analisis statistik untuk dabit aliran gas palindung menunjukkan  bahwa nilai signifikansi sebesar 0.144 lebih besar dari 0,05, atau H0 tidak ditolak artinya penggunaan variasi debit aliran gas pelindung tidak berpengaruh terhadap kekuatan tarik. Nilai kekuatan tarik tertinggi terdapat pada penggunaan arus 90A dengan debit aliran gas 8 L/menit sebesar 610,54 Mpa. Nilai kekuatan tarik terendah terdapat pada penggunaan arus 80A dengan debit aliran gas10 L/menit sebesar 560,89 Mpa.Kata Kunci: Stainless Steel, GTAW, Kua Tarik, Tungsten Inert Gas  

Optimization of tungsten inert gas welding parameters to

2018 ◽  
Vol 5 (11) ◽  
pp. 25112-25120 ◽  
Author(s):  
V. Mohanavel ◽  
M. Ravichandran ◽  
S. Suresh Kumar
Keyword(s):  
Inert Gas ◽  
Welding Parameters ◽  
Tungsten Inert Gas Welding

Influence of welding parameters on pit initiation and pit growth in welded joints of X5CrNi18-10 stainless steel

2018 ◽  
Vol 63 (1) ◽  
pp. 167-179 ◽  
Author(s):  
Bore V. Jegdić ◽  
Biljana M. Bobić ◽  
Bojana M. Radojković ◽  
Behar Alić
Keyword(s):  
Stainless Steel ◽  
Welded Joints ◽  
Welding Parameters ◽  
Pit Initiation

Effect of Pressure on the Gas Atomizer to Fabricate Stainless Steel Metal Powder

2020 ◽  
Vol 833 ◽  
pp. 54-58 ◽  
Author(s):  
Sugeng Supriadi ◽  
Tsaome Indah Susimah ◽  
Muhammad Haekal Sena Akbar ◽  
Bambang Suharno ◽  
Ario Sunar Baskoro ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Metal Powder ◽  
Large Scale ◽  
Spherical Shape ◽  
Free Fall ◽  
Gas Pressure ◽  
Raw Material ◽  
Application Process ◽  
Electric Induction ◽  
Stainless Steel 304

Metal powder is used in the Powder Metallurgy (PM) application process. Most of the metals used in the PM are stainless steel made by the gas atomization process. This study uses the free fall gas atomizer. The material was used to produce the metal powder from various forms of stainless steel 304 raw material, which is melted in an electric induction furnace. This method is very practical to be applied in the large-scale metal processing industries. While the gas pressure variation results show that metal powder with a smaller size will be produced more using high gas pressure. The free fall gas atomizer has successfully produced stainless steel 304 metal powder with the size <40 μm and have a spherical shape. The well-rounded sphericity for 8 bar pressure, 10 bar pressure, and 12 bar pressure are 61.1%, 41.7%, and 37.5% respectively. It can be concluded that 12 bar pressure produces the smallest size range of powder about <40 µm with the most quantity about 1.11%wt, followed by 10 bar pressure about 0.41%wt and 8 bar pressure about 0.07%wt.

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