Effect of heat input and role of nitrogen on the phase evolution of 2205 duplex stainless steel weldment

Varbai, Balázs; Pickle, Timothy; Májlinger, Kornél

doi:10.1016/j.ijpvp.2019.103952

Cited by 50 publications

(26 citation statements)

References 35 publications

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“…Nitrogen is an indispensable element of austenite, and beneficial for the ferrite-to-austenite transformation [25,26]. Varbai et al [27,28] studied the influence of weld thermal cycles and shielding gas nitrogen content on DSS weld microstructure by simulated experiment. The results showed that the nitrogen loss from the molten pool caused a lower austenite fraction in the weld metal, and higher nitrogen content in the shielding gas will result in higher initial austenite fraction.…”

Section: Discussionmentioning

confidence: 99%

Influence of Shielding Gas on Microstructure and Properties of GMAW DSS2205 Welded Joints

et al. 2021

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In the present study, the microstructures and properties of DSS 2205 solid wire MIG welded samples prepared in different shielding gases (pure Ar gas, 98%Ar + 2%O2 and 98%Ar + 2%N2) were investigated for improving the weldability of DSS 2205 welded joint. The work was conducted by mechanical property tests (hardness and tensile test) and corrosion resistance property tests (immersion and electrochemical tests). The results show that adding 2%O2 into pure Ar gas as the shielding gas decreases crystal defects (faults) and improves the mechanical properties and corrosion resistance of the welded joints. Phase equilibrium and microstructural homogeneity in welded seam (WS) and heat-affected zone (HAZ) can be adjusted and the strength and corrosion resistance of welded joints increased obviously by adding 2%N2 to pure Ar gas as the shielding gas. Compared with DSS 2205 solid wire MIG welding in 98%Ar + 2%O2 mixed atmosphere, the strength and corrosion resistance of welded joints are improved more obviously in 98%Ar + 2%N2 mixed atmosphere.

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Section: Discussionmentioning

confidence: 99%

Influence of Shielding Gas on Microstructure and Properties of GMAW DSS2205 Welded Joints

et al. 2021

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“…However, the welding with smaller welding speed did not allow for forming a proper welded joint. Varbai et al [40] found that the thermal cycle has a significant role in formation structures in HAZ, which may cause deformations. Due to this statement, a lower welding speed may decrease the value of angular distortion.…”

Section: Figmentioning

confidence: 99%

Influence of Tack Welds Distribution and Welding Sequence on the Angular Distortion of Tig Welded Joint

Tomków

Sobota²,

Krajewski

2020

FU Mech Eng

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In this paper the influence of tack welds distribution and welding sequence on angular distortion of the Tungsten Inert Gas (TIG) welded joint was tested. Additionally, the effect of welding current on angular distortion was assessed. For research X2CrTiNb18 (AISI 441) stainless steel (2.5 mm thick) was chosen. During research specimens were prepared with different distributions of tack welds. Then they were welded by different welding sequences with the use of different welding current values. After welding the angular distortion of each specimen was measured by using the coordinate measuring machine. In the next step specimens were cut. Cross-sections were polished and the metallographic macroscopic testing was conducted to check the geometry of performed welds. Performed experiments allowed determining the optimal tack weld sequence and welding parameters for welding thin stainless steel sheets.

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“…In addition to ratio variation of the austenite and ferrite phases, compounds precipitation (σ, χ, Cr 23 C 6 , Cr 2 N, etc. ), slag inclusion, and blowholes turn out [ 8 , 9 , 10 ] and result in a large residual tensile stress at the welded region. Thermal stress is the main part of residual stress, which is caused by the resolidification and cooling shrinkage of weld material after melting.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Stress Relief Treatments on Microstructure, Mechanical and Corrosion Properties of Metal Active-Gas Welding Joint of 2205 Duplex Stainless Steel

et al. 2020

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Stress relief treatments were carried out separately with a pneumatic chipping hammer, ultrasonic peening treatment, and heat treatment for metal active-gas welding (MAG) welded joints of 2205 duplex stainless steel. The effects of these methods on the residual stress, microstructure, mechanical properties and corrosion resistance of welded joints were studied. Results show the stress state of the weld and the surrounding area was effectively improved by the pneumatic chipping hammer and ultrasonic peening treatment, and the residual stress field of the surface layer changed from tensile stress to compressive stress. On the contrary, low-temperature stress relieving annealing had no obvious effect on stress distribution. After the pneumatic chipping hammer and ultrasonic peening treatment, the welded joints were machined and hardened. Correspondingly, strength and hardness were improved. However, the heat treatment only led to a slight decrease in strength and hardness due to the static recovery of the welded joint structure. All stress relief methods effectively improved the corrosion resistance of welded joints, with the ultrasonic peening treatment giving the best performance.

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Effect of heat input and role of nitrogen on the phase evolution of 2205 duplex stainless steel weldment

Cited by 50 publications

References 35 publications

Influence of Shielding Gas on Microstructure and Properties of GMAW DSS2205 Welded Joints

Influence of Shielding Gas on Microstructure and Properties of GMAW DSS2205 Welded Joints

Influence of Tack Welds Distribution and Welding Sequence on the Angular Distortion of Tig Welded Joint

Impacts of Stress Relief Treatments on Microstructure, Mechanical and Corrosion Properties of Metal Active-Gas Welding Joint of 2205 Duplex Stainless Steel

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