Effect of welding parameters on pitting behavior of GTAW of DSS and super DSS weldments

Paulraj, Prabhu; Garg, Rajnish

doi:10.1016/j.jestch.2016.01.013

Cited by 34 publications

(23 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…6 . A recent attempt on DSS weld shows that the precipitation of γ 2 phases leads to the pitting attack in the weldment due to the chemical imbalance between the phases [61] . However, the simple presence of γ 2 is not causing the loss of corrosion resistance.…”

Section: Microstructural Changes In Dss Weldmentioning

confidence: 99%

Weldability, machinability and surfacing of commercial duplex stainless steel AISI2205 for marine applications – A recent review

Jebaraj

Ajaykumar²,

Deepak

et al. 2017

Journal of Advanced Research

131

View full text Add to dashboard Cite

show abstract

Section: Microstructural Changes In Dss Weldmentioning

confidence: 99%

Weldability, machinability and surfacing of commercial duplex stainless steel AISI2205 for marine applications – A recent review

Jebaraj

Ajaykumar²,

Deepak

et al. 2017

Journal of Advanced Research

131

View full text Add to dashboard Cite

show abstract

“…An example of this appears in the heat-affected zone (HAZ) and the fusion zone (FZ), where the microstructure undergoes rapid cooling and heating cycles that result in changes in the orientation and size of the ferritic grain, as well as in excessive amount of ferrite. Previous research reported that austenite contents of less than 30% are inadequate for most industrial applications [14][15][16][17]. Ravisankar et.al.…”

mentioning

confidence: 99%

Maintenance of the Austenite/Ferrite Ratio Balance in GTAW DSS Joints Through Process Parameters Optimization

Rodriguez¹,

Miranda²,

González

et al. 2020

Materials

View full text Add to dashboard Cite

The present work describes the influence of the parameters employed in the gas tungsten arc welding process (GTAW) when nickel powder is used as a filler metal in 2304/2507 duplex stainless-steel dissimilar joints. Multi-objective optimization was applied in order to maintain the austenite/ferrite percentage in the welded zone. A microstructural and phase quantification analysis was performed in each sample through optical and scanning electron microscopes. It was found that a nickel powder addition combined with low heat input increased the biphasic ratio across the different zones of the dissimilar welded samples. Although the austenite volume fraction increased in the 2304 heat-affected zone (HAZ) near to 25%, it was not sufficient according to international standards. The obtained results led to the maintenance of the 50/50 phase percentage in the 2507 HAZ welded joint side, as well as to the increment of the austenite percentage in the 2304 HAZ.Materials 2020, 13, 780 2 of 14 temperatures, another phenomenon is observed: ferrite decomposition occurs, causing the formation of harmful secondary phases, such as sigma (σ), chi (χ), carbides, and nitrides phases, which subsequently deteriorate the mechanical and corrosion-resistance properties of the DSS. Santos et al. conducted a study, based on the analysis of thermal history, which showed the temperature measured across the weld and its effect on the microstructural and mechanical behavior, and compared the results with the three-dimensional finite element model built. In addition, Sarlak, Atapour, and collaborators specifically studied the corrosion behavior across the welding in samples obtained by the welding process of a lean duplex stainless steel (LDSS) and its effect on the microstructure [9][10][11].Various joining techniques, such as plasma, laser, tungsten inert gas (TIG), and gas metal arc welding (GMAW) are being developed to meet the requirements demanded by these materials, avoiding distortion. However, ferritization is a problem with these processes. In addition, the effect generated by the entry of heat into these materials is a research topic. Plasma arc welding has beneficial results for DSS, which is situated at a controlled heat input and an acceptable ferrite ratio compared with other processes. Flux-cored arc welding (FCAW) has gradually attracted strong attention in welding DSS due to its higher welding efficiency compared with the gas tungsten arc welding process (GTAW) process. However, studies on the microstructure, mechanical properties, and corrosion resistance of the DSS FCAW joint are limited. Advanced laser hybrid welding has a great advantage for DSS, because it reduces heat input and distortion level compared with SAW and FCAW [12,13]. The GTAW is a welding procedure that has been employed efficiently in past years to weld materials such as stainless steels due to its facility to produce sound joints that meet specific requirements of industries, added to its facility to work when thin materials are required. However, it has be...

show abstract

“…The GTAW method is easy to use and is characterized by a low cost equipment. Furthermore, use of the GTAW method allows the functional properties of the surface to be modified [28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Plasma Spraying (APS) and Alloying as Methods to Modify Properties of the SSS Surface Layers

Lisiecka¹,

Dudek²,

Ulewicz³

2020

Komunikácie

View full text Add to dashboard Cite

Use of the powder metallurgy (PM) in production of various components has been growing in the automotive industry, including production of sintered stainless steels (SSSs). This study aims to improve the functional properties of SSSs by formation of the Cr3C2-NiCr coating by APS method. The next stage involved alloying of the surface of SSSs using the gas tungsten arc welding (GTAW). Analysis of microstructures was carried out using microscopy (metallographic microscope and scanning electron microscope). Furthermore, the study presents XRD (X-ray powder diffraction) examinations, mechanical properties and surface roughness measurements. The presented modification improved properties of the surface layers examined in the study and enabled a reduction in the wall thickness of the detail, which is important factor in the automotive and transport industry.

show abstract

Effect of welding parameters on pitting behavior of GTAW of DSS and super DSS weldments

Cited by 34 publications

References 10 publications

Weldability, machinability and surfacing of commercial duplex stainless steel AISI2205 for marine applications – A recent review

Weldability, machinability and surfacing of commercial duplex stainless steel AISI2205 for marine applications – A recent review

Maintenance of the Austenite/Ferrite Ratio Balance in GTAW DSS Joints Through Process Parameters Optimization

Atmospheric Plasma Spraying (APS) and Alloying as Methods to Modify Properties of the SSS Surface Layers

Contact Info

Product

Resources

About