Friction stir welding: An alternative to fusion welding for better stress corrosion cracking resistance of maraging steel

Meshram, Suresh; Paradkar, Archana; Reddy, G. Madhusudhan; Pandey, Sunil

doi:10.1016/j.jmapro.2016.11.005

Cited by 35 publications

(7 citation statements)

References 21 publications

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“…Friction stir welding (FSW) is a solid state joining process developed by The Welding Institute (TWI) to weld aluminum and magnesium alloys . During the FSW process, a rotating tool with a specially designed pin and shoulder is plunged into the joint between the workpieces and traversed along the line of joint.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Microstructure and Tensile Properties of Dual Phase Steel Welded Using Friction Stir Welding and Gas Tungsten Arc Welding

Ashrafi

Shamanian

Emadi

et al. 2018

steel research int.

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In the present research, a comparative study on influence of friction stir welding (FSW) and gas tungsten arc welding (GTAW) processes on the microstructure and tensile properties of dual phase steel welds is carried out. The results indicate that the microstructure of weld metal and inner part of the heat affected zone (HAZ) in the GTA welded sample is composed of coarse bainite, Widmanestatten ferrite and ferrite–carbide (FC) aggregate. The sample welded by FSW exhibits the formation of fine ferrite, FC aggregate, and bainite in the weld nugget and inner part of the HAZ. Microhardness measurements reveal the formation of a softened zone in the subcritical area of the HAZ due to the tempering of the pre‐existing martensite. Both joints show lower tensile strength, tensile elongation and work hardening exponent compared to the base metal (BM), and fail in the softened HAZ during the uniaxial tensile test. However, the joint efficiency, work hardening rate and work hardening exponent of the sample welded by FSW are superior to those for the GTA welded sample. The predominant fracture mechanism for all samples is ductile with dimples on the fractured surfaces.

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Section: Introductionmentioning

confidence: 99%

Comparison of Microstructure and Tensile Properties of Dual Phase Steel Welded Using Friction Stir Welding and Gas Tungsten Arc Welding

Ashrafi

Shamanian

Emadi

et al. 2018

steel research int.

View full text Add to dashboard Cite

show abstract

“…In the case of FSW, no segregation was observed. Meshram et al 54 compared EPMA and EBSD results of GTAW and FSW of C-250 grade maraging steel. Figure 9 shows the EPMA comparison of GTAW and FSW welding processes.…”

Section: Metallurgical Characterizationmentioning

confidence: 99%

“…Table 5 summarizes their results. Meshram et al 54 compared the SCC behavior of joints produced by GTAW and FSW in C-250 grade maraging steel. The authors concluded that FSW outperforms GTA in the case of SCC resistance.…”

Section: Sccmentioning

confidence: 99%

Current research and developments in welding of 18% nickel maraging steel

Jose

Manoharan

Natarajan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Maraging steels are low-carbon, high nickel-containing precipitation-hardened steels with an excellent combination of strength and toughness. Their outstanding performance gained the increasing attention of scientists, industrialists, and end-users over the past six decades. The present global rapid growth in the consumption of maraging steel, particularly in aerospace, defense and other engineering applications, involves the fabrication of high-performance welded joints. Maraging steels offer relatively high flexibility from the welding point of view. Gas tungsten arc welding is the most preferred welding process for maraging steels. As the need for increased productivity is growing worldwide in many fields, such as aerospace, mechanical engineering, etc., where thick sections are used, issues like heat input, inter-pass temperature, cooling rate, and the selection of weld consumables become important for achieving defect-free joints. Many advanced techniques like plasma, laser, and hybrid welding processes are being developed to fulfil the requirements for joining higher thickness products without distortion. The major problem associated with welding maraging steel is the formation of reverted austenite in the fusion zone and the heat-affected zone. This problem can be mitigated by choosing optimized filler wires and the proper selection of post-weld heat treatment for the weldments. This paper extensively reviews the influence of welding processes and conditions on the microstructure and mechanical properties of maraging steels with due emphasis to structure–property relationships.

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“…FSW is being introduced approximately around last decade [9], is a solid state welding process MATEC Web of Conferences 150, 04004 (2018) https://doi.org/10.1051/matecconf/201815004004 MUCET 2017 that normally used for welding soft materials like aluminium and magnesium alloys and in addition, to dissimilar metals that frequently facing a problem due to the hard in joining by conventional fusion techniques [10][11]. FSW reveals many advantages such as low distortion and wide chemical tolerance due to the heat input in the process is below the melting point [12].…”

Section: Weldingmentioning

confidence: 99%

Model Updating of Friction Stir Welding for Aluminium and Magnesium Plate Structure

Nazri

Sani

Mansor

et al. 2018

MATEC Web of Conferences

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Abstract. Friction stir welding (FSW) of aluminium and magnesium alloys face high demands in automotive and aerospace application due to its advanced and lightweight properties. FSW is an emerging solid state joining process in which the material that is being welded does not melt and recast. The main objectives of this project are to perform model updating based on finite element analysis (FEA) and experimental modal analysis (EMA) of dissimilar material of aluminium alloy AL 7075 and magnesium alloy AZ 31B. Modal properties such as natural frequencies, mode shapes are obtained and compared between FEA and EMA. The discrepancies of first five modes natural frequencies are below than 10% and the model updating have been conducted to minimize the error between two methods. This model updating are based on sensitivity analysis in order to make sure which parameters are given more influence in this structural dynamic analysis. Young's modulus and Poisson's ratio both materials are selected in the model updating process. After perform model updating, total average error of the natural frequencies of dissimilar friction stir welding plate is improved significantly.

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Friction stir welding: An alternative to fusion welding for better stress corrosion cracking resistance of maraging steel

Cited by 35 publications

References 21 publications

Comparison of Microstructure and Tensile Properties of Dual Phase Steel Welded Using Friction Stir Welding and Gas Tungsten Arc Welding

Comparison of Microstructure and Tensile Properties of Dual Phase Steel Welded Using Friction Stir Welding and Gas Tungsten Arc Welding

Current research and developments in welding of 18% nickel maraging steel

Model Updating of Friction Stir Welding for Aluminium and Magnesium Plate Structure

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