Metallurgical Investigations of Microstructure and Micro hardness across the various zones in Synergic MIG Welding of Stainless steel

Meena, Shanti Lal; Butola, Ravi; Murtaza, Qasim; Jayantilal, Hardik; Niranjan, Mahendra Singh

doi:10.1016/j.matpr.2017.07.166

Cited by 14 publications

(3 citation statements)

References 10 publications

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“…Figure 7 shows the graph of variation in micro-hardness as a function of distance. From the figure it is seen that hardness in base metal is low and increases slowly until HAZ boundary is reached (Meena et al , 2017). In HAZ, the micro hardness rapidly increases, reaches maximum value close to weld metal/HAZ interface and then decreases upto the end of HAZ.…”

Section: Resultsmentioning

confidence: 99%

Shielded metal arc welding of AISI 409M ferritic stainless steel: study on mechanical, intergranular corrosion properties and microstructure analysis

Ambade

Tembhurkar²,

Patil

et al. 2021

WJE

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Purpose The purpose of this study is on AISI 409 M ferritic stainless steel (FSS) which is developing a preferred choice for railway carriages, storage tanks and reactors in chemical plants. The intergranular corrosion behavior of welded SS 409 M has been studied in H2SO4 solution (0.5 M) with the addition of NH4SCN (0.01 M) with different heat input. As this study is very important in context of various chemical and petrochemical industries. Design/methodology/approach The microstructure, mechanical properties and intergranular corrosion properties of AISI 409 M FSS using shielded metal arc welding were investigated. Shielded metal arc welding with different welding current values are used to change the heat input in the joints resulted in the microstructural variations. The microstructure of the welded steel was carefully inspected along the width of the heat-affected zone (HAZ) and the transverse-section of the thin plate. Findings The width of heat affected zone (3.1,4.2 and 5.8 mm) increases on increasing the welding heat input. Due to change in grain size (grain coarsening) as HAZ increased. From the microstructure, it was observed that the large grain growth which is dendritic and the structure become finer to increase in welding heat input. For lower heat input, the maximum microhardness value (388HV) was observed compared with medium (351 HV) and higher heat input (344 HV), which is caused by a rapid cooling rate and the depleted area of chromium (Cr) and nickel (Ni). The increase in weld heat input decreases tensile strength, i.e. 465 MPa, 440 MPa and 418 MPa for low, medium and high heat input, respectively. This is because of grain coarsening and chromium carbide precipitation in sensitized zone and wider HAZ. The degree of sensitization increases (27.04%, 31.86% and 36.08%) to increase welding heat input because of chromium carbide deposition at the grain boundaries. The results revealed that the higher degree of sensitization and the difference in intergranular corrosion behavior under high heat input are related to the grain growth in the HAZ and the weld zone. Originality/value The study is based on intergranular corrosion behavior of welded SS 409 M in H2SO4 solution (0.5 M) with the addition of NH4SCN (0.01 M) with different heat input which is rarely found in literature.

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Section: Resultsmentioning

confidence: 99%

Shielded metal arc welding of AISI 409M ferritic stainless steel: study on mechanical, intergranular corrosion properties and microstructure analysis

Ambade

Tembhurkar²,

Patil

et al. 2021

WJE

View full text Add to dashboard Cite

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“…For the TIG welding, the impact of the welding current was observed to produce excellent ultimate tensile strength compared with the weld done at higher current supply. According to [25], optimization of welding parameters will help in obtaining better microstructural and mechanical properties of combine TIG-MIG welding when compared to the standalone TIG and MIG welding process. This was validated by using TIG and MIG welding machine having a combine heat source of 400 A.…”

Section: Figurementioning

confidence: 99%

Effect of Welding Process Parameters on the Mechanical Properties of TIG and MIG Welds in HSS X65 Pipe-A Review

Lawal,

Afolalu

2024

IOP Conf. Ser.: Earth Environ. Sci.

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The study focused on the importance of the different welding parameters on the mechanical behavior of High Strength Steel (HSS) X65 steel pipes by reviewing the advantages of parameter optimization for the Tungsten Inert Gas (TIG) - Metal Inert Gas (MIG) welding processes. The parameters considered in the study include welding speed, welding current, welding voltage and gas flowrate of the welding. The effects of improper selection and parameter optimizations were highlighted and illustrated using different metallurgical and mechanical instances. The outcome of the study indicates that adequate parameter optimization aids in obtaining good weld quality with adequate mechanical and microstructural properties. Furthermore, it helps in the determination of variation in hardness in the heat affected zone as well as the base metal. Thus, this study provides insight to welding engineers on the importance of parameter optimization in the welding of steel pipe.

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“…Metal inert gas welding, commonly referred to as MIG welding, is extensively employed across diverse industries, including manufacturing, oil and gas, and construction [1,2] The primary factor contributing to its extensive implementation is its high level of efficiency and minimal depletion of alloying elements. MIG welding is a highly adaptable choice for various production environments, as it possesses the capability to accommodate both semi-automatic and fully automatic operations [3]. The process of MIG welding entails the controlled application of heat to fuse filler and parent metals, thereby generating a localised fusion zone [4,5].…”

Section: Introductionmentioning

confidence: 99%

Integrated Assessment of MIG Welding Parameters on Carbon Steel using RSM Optimisation

Junita Mohd Said,

Faiz Mohd Turan,

Norazlianie Sazali

2023

ARAM

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This study examined how parameter optimisation in MIG welding affects material properties, weld quality, flexural strength, and weld bead geometry using an experimental design. Structural testing reveals that weld pool imperfections, especially in welded joints, often lead to metal failure. Incorrect selection of welding parameters, material weldability, and metal forming contribute to defects and necessitate post-treatment. The study aims to minimize weld defects and maximize material strength in welded parts using a quadratic second-order regression model to predict optimal process parameters. The chosen JIS G3131 hot-rolled carbon steel material is commonly used in automotive parts, is cost-effective, and can be easily welded. The welding process is MIG buttweld according to AWS 1.1 standards. The tests match the RSM design's 3-by-3 orthogonal array. The process parameters are welding current, arc voltage, and welding speed. The responses are bead height, bead width, penetration, and flexural strength. NDT X-ray radiography detects flaws in weld pools. The welded connection's durability is determined with a three-point bending test. Experiments are conducted to find the best input parameters with 95% confidence. This study also uses an experimental design based on an orthogonal array and an analysis of variance (ANOVA). Contribution to factors and regression analysis. The predicted flexural strength was 903.1 MPa, with a 0.66% error compared to the experimental value of 897 MPa. Predicted values for weld penetration, bead width, and bead height are 3.01, 9.45, and 2.04. In the RT inspection test, the test sample with the optimum parameters had no defects in the welded joint. The optimal parameter values for the regression analysis of the RSM combination are 115, 20, and 18 for current, speed, and voltage. Confirmation tests for DT and NDT were performed to validate the optimal parameter settings. This research shows that optimizing process parameters for welded products improves weld geometry and flexural strength. This method is widely used and valuable in metal fabrication.

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Metallurgical Investigations of Microstructure and Micro hardness across the various zones in Synergic MIG Welding of Stainless steel

Cited by 14 publications

References 10 publications

Shielded metal arc welding of AISI 409M ferritic stainless steel: study on mechanical, intergranular corrosion properties and microstructure analysis

Shielded metal arc welding of AISI 409M ferritic stainless steel: study on mechanical, intergranular corrosion properties and microstructure analysis

Effect of Welding Process Parameters on the Mechanical Properties of TIG and MIG Welds in HSS X65 Pipe-A Review

Integrated Assessment of MIG Welding Parameters on Carbon Steel using RSM Optimisation

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