Effect of Heat Input on the Microstructural, Mechanical, and Corrosion Properties of Dissimilar Weldment of Conventional Austenitic Stainless Steel and Low-Nickel Stainless Steel

Tandon, Vipin; Thombre, Manish A.; Patil, Awanikumar P.; Taiwade, Ravindra V.; Vashishtha, Himanshu

doi:10.1007/s13632-020-00681-y

Cited by 26 publications

(21 citation statements)

References 29 publications

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“…Furthermore, the fast cooling rate associated with the low heat input results in higher delta ferrite content promoted in the FZ. This also enhances the strength of the joint welded at low heat input, which is in agreement with the literature [13,33,38]. [40,41] and presented in Table 5.…”

Section: Joint Efficiency =supporting

confidence: 92%

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Study on the Mechanical Performance of Dissimilar Butt Joints between Low Ni Medium-Mn and Ni-Cr Austenitic Stainless Steels Processed by Gas Tungsten Arc Welding

Ibrahim

Khedr

Mahmoud

et al. 2021

Metals

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In the present work, dissimilar butt joints between a low-Ni, medium-Mn austenitic stainless steel, M-Mn SS, and a Ni-Cr austenitic stainless steel, Ni-Cr SS, were processed by utilizing the gas tungsten arc welding (GTAW) technique at different heat inputs. A filler metal of ER308 was employed in the welding process. The filler yields 480 MPa, which is equivalent to the yield strength of M-Mn SS. The microstructural analysis and mechanical performance (i.e., tensile strength and hardness properties) of the concerned joints were studied by using an optical microscope and uniaxial tensile tests, respectively. The results revealed that a duplex structure from austenite matrix and delta ferrite is promoted in the fusion zone (FZ) of the dissimilar joints processed with low and high energy inputs (0.486 kJ/mm and 0.558 kJ/mm). The FZ of the specimens welded at high heat input exhibited the lowest hardness value (151.2 HV) in comparison to heat affected zone (HAZ) (166.3 HV). Moreover, the joints exhibited a low tensile strength of 610 MPa. The achieved strength is significantly lower than the strengths of the base metals (BMs) M-Mn SS and Ni-Cr SS. This is mainly attributed to the inhomogeneous dendritic structure of the FZ with Cr-carbides precipitation.

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Section: Joint Efficiency =supporting

confidence: 92%

“…These results can be attributed to the high content of delta ferrite in the weld metal at the low heat input. In addition, the small dendrite sizes and interdendritic spacing in the weld metal enhance the tensile properties [13,27]. The joint efficiency was calculated according to Equation (5) [40,41] and presented in Table 5.…”

Section: Tension Test Resultsmentioning

confidence: 99%

Study on the Mechanical Performance of Dissimilar Butt Joints between Low Ni Medium-Mn and Ni-Cr Austenitic Stainless Steels Processed by Gas Tungsten Arc Welding

Ibrahim

Khedr

Mahmoud

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

“…The residual stresses in both phases were below the yield strength, whose values obtained by tensile test were 518±36 MPa and 287±9 MPa, respectively, for 201LN and 304L steels. The difference between these values was 3, which also contributed to an increase in the mechanical properties 36,37 .…”

Section: Resultsmentioning

confidence: 99%

Effect of Shot Peening Treatment on Residual Stress and Magnetic Barkhausen Noise of AISI 201LN and AISI 304L Stainless Steels

et al. 2022

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This work evaluates microstructural changes and residual stresses on surface samples of AISI 201LN and 304L subjected to shot peening. The residual stresses were measured by Xray diffraction and magnetic Barkhausen noise (MBN) in different shot-peened conditions. The results showed that the 201LN steel presented more martensite than the 304L steel in the initial condition, but with lower δferrite contents. These ferromagnetic phases were present in a low amount with high tensile residual stresses due to brush cleaning and light coldrolling in the final stage of the fabrication process. The shot peening process promoted compressive residual stresses mainly in the δferrite. However, some "fresh" martensite exhibited tensile residual stress represented by higher and thinner peaks, which together with the low-intensity amplitude in the neighborhood, represented all formed martensite. Thus, small microstructural changes provoked high residual stresses behavior, which can be detected in ferromagnetic phases by MBN.

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“…Considerable efforts related to the welding of MMn–SSs have been made to investigate the effects of welding parameter changes in the metallurgical characteristics and mechanical properties of the welded joints. The effect of heat input manipulation on the characteristics of similar and dissimilar MMn–SS welded joints was reported in the literature [ 11 , 17 , 18 , 19 , 20 , 21 ]. It was found that with the increase in the heat input, the mechanical performance of the welded joints deteriorated.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution and Mechanical Performance of Two Joints of Medium-Mn Stainless Steel with Low- and High-Alloyed Steels

et al. 2023

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In this work, 2 mm thick medium-Mn austenitic stainless steel (MMn–SS) plates were joined with austenitic NiCr stainless steel (NiCr–SS) and low-carbon steel (LCS) using the gas tungsten arc welding technique. A precise adjustment of the welding process parameters was conducted to achieve high-quality dissimilar joints of MMn–SS with NiCr–SS and LCS. The microstructural evolution was studied using laser scanning confocal and electron microscopes. Secondary electron imaging and electron backscatter diffraction (EBSD) techniques were intensively employed to analyze the fine features of the weld structures. The mechanical properties of the joints were evaluated by uniaxial tensile tests and micro-indentation hardness (HIT). The microstructure of the fusion zone (FZ) in the MMn–SS joints exhibited an austenitic matrix with a small fraction of δ-ferrite, ~6%. The tensile strength (TS) of the MMn–SS/NiCr–SS joint is significantly higher than that of the MMn–SS/LCS joint. For instance, the TSs of MMn–SS joints with NiCr–SS and LCS are 610 and 340 MPa, respectively. The tensile properties of MMn–SS/LCS joints are similar to those of BM LCS, since the deformation behavior and shape of the tensile flow curve for that joint are comparable with the flow curve of LCS. The HIT measurements show that the MMn–SS/NiCr–SS joint is significantly stronger than the MMn–SS/LCS joint since the HIT values are 2.18 and 1.85 GPa, respectively.

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Effect of Heat Input on the Microstructural, Mechanical, and Corrosion Properties of Dissimilar Weldment of Conventional Austenitic Stainless Steel and Low-Nickel Stainless Steel

Cited by 26 publications

References 29 publications

Study on the Mechanical Performance of Dissimilar Butt Joints between Low Ni Medium-Mn and Ni-Cr Austenitic Stainless Steels Processed by Gas Tungsten Arc Welding

Study on the Mechanical Performance of Dissimilar Butt Joints between Low Ni Medium-Mn and Ni-Cr Austenitic Stainless Steels Processed by Gas Tungsten Arc Welding

Effect of Shot Peening Treatment on Residual Stress and Magnetic Barkhausen Noise of AISI 201LN and AISI 304L Stainless Steels

Microstructural Evolution and Mechanical Performance of Two Joints of Medium-Mn Stainless Steel with Low- and High-Alloyed Steels

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