Microstructural characterization and mechanical properties of K-TIG welded SAF2205/AISI316L dissimilar joint

Fei, Zhenyu; Pan, Zengxi; Cuiuri, Dominic; Li, Hui Jun; Duin, Stephen van; Yu, Ziping

doi:10.1016/j.jmapro.2019.07.017

Cited by 46 publications

(19 citation statements)

References 41 publications

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“…For 316L austenitic stainless steel microhardness value was in a range of 186–209 HV0.2, which corresponds well to the literature [ 38 , 50 ]. The microhardness fluctuations in the 316L steel are due to the presence of a large number of delta ferrite precipitates in the austenitic structure.…”

Section: Resultssupporting

confidence: 88%

“…The results are distinctive for dissimilar austenitic-duplex stainless steel welded joints-which was also demonstrated by other authors [33,52,54]. For 316L austenitic stainless steel microhardness value was in a range of 186-209 HV0.2, which corresponds well to the literature [38,50]. The microhardness fluctuations in the 316L steel are due to the presence of a large number of delta ferrite precipitates in the austenitic structure.…”

Section: Microhardness Measurementssupporting

confidence: 87%

“…The results of these analyzes are generally consistent with the results of metallographic examinations and ferrite content measurements. Solidification mode of stainless steels can be predicted by the Fe-Ni-Cr pseudo-binary phase diagram shown in Figure 12 based on Creq/Nieq ratio [50]. As a result of welding of 316L steel without filler metal (Creq/Nieq = 1.71) the weld solidification mode is ferrite-austenite (FA).…”

Section: Ferrite Content Measurements and Calculationsmentioning

confidence: 99%

“…However, among the various austenitic consumables, the most beneficial, both in terms of strength properties, as well as morphology and corrosion resistance, is the use of 309L [ 47 , 48 ] or super austenitic 904L filler metal [ 49 ]. The literature also describes attempts to weld such a material combination without filler material: using different variants of the TIG process [ 50 , 51 ] or concentrated welding sources [ 33 , 52 , 53 ]. Ridha Mohammed et al stated that the mechanical properties of the duplex-austenitic steel fiber laser joints were better compared with the base materials (BM) because of the small HAZ [ 52 ].…”

Section: Introductionmentioning

confidence: 99%

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Autogenous Fiber Laser Welding of 316L Austenitic and 2304 Lean Duplex Stainless Steels

2020

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This study presents results of experimental tests on quality of dissimilar welded joints between 316L austenitic and 2304 lean duplex stainless steels, welded without ceramic backing. Fiber laser welded butt joints at a thickness of 8 mm were subjected to non-destructive testing (visual and penetrant), destructive testing (static tensile test, bending test, and microhardness measurements) and structure observations (macro- and microscopic examinations, SEM, element distribution characteristics, and ferrite content measurements). Non-destructive tests and metallographic examinations showed that the welded joints meet the acceptance criteria for B level in accordance with EN ISO 13919–1 standard. Also the results of the destructive tests confirmed the high quality of the joints: specimens were fractured in base material with lower strength—316L austenitic stainless steel and a 180° bending angle was obtained confirming the high plasticity of the joints. Microscopic examination, SEM and EDS analysis showed the distribution of alloying elements in joints. The microhardness of the autogenous weld metal was higher by about 20 HV0.2 than that of the lean duplex steel. Ferrite content in the root was about 37% higher than in the face of the weld. The Schaeffler phase diagram was used to predict the phase composition of the welded joints and sufficient compliance with the magnetic method was found. The presented procedure can be used for welding of 316L–2304 stainless steels dissimilar welded joints of 8 mm thickness without ceramic backing.

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Section: Resultssupporting

confidence: 88%

Section: Microhardness Measurementssupporting

confidence: 87%

Section: Ferrite Content Measurements and Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Autogenous Fiber Laser Welding of 316L Austenitic and 2304 Lean Duplex Stainless Steels

2020

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“…To date, K-TIG has found applications in industries for joining medium thickness materials, say titanium [6], zirconium [7], stainless steel [8], low carbon steel [9] and dissimilar metal welding [10]. It was shown in these studies that K-TIG can complete the medium thickness weld in a single pass with a V-shaped morphology.…”

Section: Of 15mentioning

confidence: 99%

Effect of Heat Input on Weld Formation and Tensile Properties in Keyhole Mode TIG Welding Process

Fei

Pan

Cuiuri

et al. 2019

Metals

Self Cite

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Keyhole mode Tungsten Inert Gas (K-TIG) welding is a novel advanced deep penetration welding technology which provides an alternative to high power density welding in terms of achieving keyhole mode welding. In order to facilitate welding procedure optimisation in this newly developed welding technology, the relationship among welding parameters, weld formation and tensile properties during the K-TIG welding was investigated in detail. Results show that except for travel speed, the heat input level also plays an important role in forming undercut defect by changing the plasma jet trajectory inside keyhole channel, leading to the formation of hump in the weld centre and exacerbation of undercut formation. Both undercut defect and root side fusion boundary can act as a stress concentration point, which affects the fracture mode and tensile properties considerably. The research results provide a practical guidance of process parameter optimisation and quality assurance for the K-TIG welding process.

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Keyhole TIG Welding of New Co-Lean Nickel-Based Superalloy G27

Ariaseta

Pick

Andersson

et al. 2023

The Minerals, Metals &Amp; Materials Series

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Microstructural characterization and mechanical properties of K-TIG welded SAF2205/AISI316L dissimilar joint

Cited by 46 publications

References 41 publications

Autogenous Fiber Laser Welding of 316L Austenitic and 2304 Lean Duplex Stainless Steels

Autogenous Fiber Laser Welding of 316L Austenitic and 2304 Lean Duplex Stainless Steels

Effect of Heat Input on Weld Formation and Tensile Properties in Keyhole Mode TIG Welding Process

Keyhole TIG Welding of New Co-Lean Nickel-Based Superalloy G27

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