scholarly journals Sensitization and Corrosion of 409M Ferritic Stainless Steel by Different Welding Processes

2019 ◽  
Vol 8 (2) ◽  
pp. 3904-3911
Keyword(s):  
Stainless Steel ◽  
Tensile Properties ◽  
Ferritic Stainless Steel ◽  
Arc Welding ◽  
Research Work ◽  
Chemical Exposure ◽  
Constant Current ◽  
Metal Arc Welding ◽  
Acidic Environments ◽  
Welding Processes

The aim of this research work was to analyze the sensitization due to the effect of welding (Shielded Metal Arc Welding, Gas Tungsten Arc Welding & Gas Metal Arc Welding) heat in heat affected zone area in terms of metallurgical properties, mechanical properties and corrosion of base metal comparatively. Also the effect of different chemicals / acidic environments on tensile properties was investigated. The plates of 3 mm thickness of 409M Ferritic Stainless Steel welded at constant current of 90A by three different welding processes with the same filler metal. The microstructure observation was made after Marble reagent chemical etched. Then tensile properties were investigated and comparative analysis done between the tensile properties i.e. before and after the chemical exposure given to it with the parent metal. After completion of experimental work it is found that SMAW, GMAW and GTAW have affected the microstructure of 409M Ferritic Stainless Steel. Due to the acidic environments/ Chemical exposures the strength and ductility of the metal affects. But comparatively GTAW has shown better process than GMAW and SMAW for welding of 409M Ferritic Stainless Steel. It should be used with caution in sulphuric acid environments than chloride environments to resist corrosion.

scholarly journals Finite Element Modeling and Experimental Validation of Microstructural Changes and Hardness Variation During Gas Metal Arc Welding of Aisi 441 Ferritic Stainless Steel

2021 ◽  
Author(s):  
SERAFINO CARUSO ◽  
STANO IMBROGNO
Keyword(s):  
Finite Element ◽  
Stainless Steel ◽  
Grain Growth ◽  
Ferritic Stainless Steel ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
User Subroutine ◽  
Hardness Variation ◽  
Metal Arc Welding ◽  
Welding Processes

Abstract Grain growth and hardness variation occurring in high temperature Heat Affected Zone (HAZ) during the welding processes are two thermal dependant aspects of great interest for both academic and industrial research activities. This paper presents an innovative Finite Element (FE) model capable to describe the grain growth and the hardness decrease that occur during the Gas Metal Arc Welding (GMAW) of commercial AISI 441 steel. The commercial FE software SFTC DEFORM-3DTM was used to simulate the GMAW process and a user subroutine was developed including a physical based model and the Hall-Petch (H-P) equation to predict grain size variation and hardness change. The model was validated by comparison with the experimental results showing its reliability in predicting important welding characteristics temperature dependant. The study provides an accurate numerical model (i.e. user subroutine, heat source fitting, geometry,…) able to successfully predict the thermal phenomena (i.e. coarsening of the grains and hardening decrease) that occur in the HAZ during welding process of ferritic stainless steel.

Effect of Post-Weld Heat Treatment on Hardness in Superduplex Stainless Steel ASTM A890/A890M - Grade 6A

2020 ◽  
Vol 1012 ◽  
pp. 296-301
Author(s):  
Clélia Ribeiro de Oliveira ◽  
Eloá Lopes Maia ◽  
Solange T. da Fonseca ◽  
Marcelo Martins ◽  
Julián Arnaldo Ávila Díaz ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Arc Welding ◽  
Treatment Condition ◽  
Heat Treatment Condition ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding ◽  
Superduplex Stainless Steel ◽  
Secondary Austenite ◽  
Welding Processes

Superduplex stainless steel alloy exhibit high mechanical and corrosion resistance, which main industrial application is in the petrochemical industry. The manufacture and maintenance of such equipment usually involve welding processes, followed by post-welded heat treatment and it often becomes impossible to apply heat treatments. Thereby, the purpose of this work is to verify the effect of a post-welded heat treatment on shielded metal arc welding in steel grade ASTM A890/A890M - grade 6A. The microstructure in the as-welded condition consisted of austenite, secondary austenite, and ferrite phases and, the post-welded heat treatment condition exhibited only austenite and ferrite. The hardness in the melt zone reached values of 300 HV after welding and, the value was reduced to 260 HV in the post-welded heat treatment condition.

Parametric Optimization of Gas Metal Arc Welding Process by using Taguchi method on Ferritic Stainless Steel AISI409

2017 ◽  
Vol 4 (2) ◽  
pp. 2213-2221 ◽  
Author(s):  
Nabendu Ghosh ◽  
Ramesh Rudrapati ◽  
Pradip Kumar Pal ◽  
Gotam Nandi
Keyword(s):  
Stainless Steel ◽  
Taguchi Method ◽  
Ferritic Stainless Steel ◽  
Arc Welding ◽  
Parametric Optimization ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Metal Arc Welding ◽  
Arc Welding Process

Effect of Gas Metal Arc Welding on Magnetic Response of Ferritic Stainless Steel

2020 ◽  
Vol 45 (2) ◽  
pp. 1293-1303
Author(s):  
Sanjay Kumar Gupta ◽  
Avinash Ravi Raja ◽  
Meghanshu Vashista ◽  
Mohd Zaheer Khan Yusufzai
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Magnetic Response ◽  
Metal Arc Welding

scholarly journals Effect of Autogenous Arc Welding Processes on Fatigue Crack Growth Behaviour of Ferritic Stainless Steel Joints

2008 ◽  
Vol 48 (4) ◽  
pp. 489-495 ◽  
Author(s):  
V. Balasubramanian ◽  
K. Shanmugam ◽  
A. K. Lakshminarayanan
Keyword(s):  
Stainless Steel ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Ferritic Stainless Steel ◽  
Arc Welding ◽  
Growth Behaviour ◽  
Crack Growth Behaviour ◽  
Steel Joints ◽  
Welding Processes

Effect of heat input on microstructure and mechanical properties in gas metal arc welding of ferritic stainless steel

2018 ◽  
Vol 6 (3) ◽  
pp. 036516 ◽  
Author(s):  
Sanjay Kumar Gupta ◽  
Avinash Ravi Raja ◽  
Meghanshu Vashista ◽  
Mohd Zaheer Khan Yusufzai
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Heat Input ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Microstructure And Mechanical Properties ◽  
Metal Arc Welding

Analysis of the GMAW Process for Microprocessor Control of Arc Length

1987 ◽  
Vol 109 (2) ◽  
pp. 172-176 ◽  
Author(s):  
E. Kannatey-Asibu
Keyword(s):  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Constant Current ◽  
Order System ◽  
Arc Length ◽  
Microprocessor Control ◽  
Metal Arc Welding ◽  
Drive Motor ◽  
Welding Processes

Control of arc length is an essential component of the automation of arc welding processes. It is even more critical in gas metal arc welding where the arc length can vary substantially since it is closely tied to the melting process. Variations in arc length can greatly affect the quality of the weld produced. Even though there are currently systems available for controlling arc length, the theory necessary for microprocessor control is not fully developed. This paper develops a model of the gas metal arc welding process as a basis for arc length control, using the input to the wire feed drive motor as the control signal. The weld process is found to be first order after linearization, and that, coupled with the drive motor dynamics, produces a second-order system. The model is verified experimentally and is found to correlate very well with experimental results, the calculated time constant for the welding system in the constant current mode being 1.7 s, while the measured value is approximately 1.5 s.

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