Microstructure and Mechanical Properties of Gas Tungsten Arc Welded High Manganese Steel Sheet

Park, Geon-Woo; Jo, Haeju; Park, Minha; Shin, Sang‐Wook; Ko, Won-Seok; Park, Nokeun; Kim, Byung-Jun; Ahn, Yong-Sik; Jeon, Jong Bae

doi:10.3390/met9111167

Cited by 12 publications

(4 citation statements)

References 51 publications

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“…The EDS mapping results indicate that Mn element was microsegregated in the interdendritic regions during solidification. It can be inferred that Mn element was repelled by the melt, and the fast enough cooling rate by welding limited its diffusion in the solid, which finally resulted in high Mn concentration in the interdendrite regions, this is consistent with the previous results reported by Park et al[24]. Furthermore, Mn content in the dendrite core and dendrite boundary were quantitatively analyzed.…”

supporting

confidence: 87%

Microstructure, non-metallic inclusions and impact toughness of high-Mn cryogenic steel weld metal

Zhang

Wang

et al. 2022

Science and Technology of Welding and Joining

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Microstructure, inclusions and cryogenic impact toughness of Fe-22.03Mn-0.45C austenitic weld metal were investigated. The results show that microstructure of weld metal consisted of straight columnar dendrites with different orientations. Microsegregation of Mn was observed in the interdendritic regions and Mn depletion thus occurred in the dendrite core, which is suggested to lead to the different morphologies of MnS oxides (Mn-Al-Si-O) depending on their location. MnS patch-type oxides were found at dendrite boundary and MnS shell-type oxides were found at dendrite core. Inclusions as crack sources were distributed in the dimple of cryogenic impact fractography, it was found that MnS patch-type oxides were more ready to act as a crack source and cause the formation of dimples than MnS shell-type oxides.

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supporting

confidence: 87%

Microstructure, non-metallic inclusions and impact toughness of high-Mn cryogenic steel weld metal

Zhang

Wang

et al. 2022

Science and Technology of Welding and Joining

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“…Gas tungsten arc welding (GTAW) achieves additive manufacturing (AM) by adding a wire feeder. It has the advantages of a stable arc, high forming quality, no splashing, less pollution, and low cost [3,4]. The process parameters of GTAW-AM include the welding current, wire feeding speed, torch travel speed, wire feeding angle, tungsten electrode height, and flow rate of protective gas [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Study on the Relationship between Process Parameters and theFormation of GTAW Additive Manufacturing of TC4 Titanium Alloy Using the Response Surface Method

Liu,

Feng,

Chen

et al. 2023

Coatings

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The geometric parameters of the deposited layer include the width, height, and penetration depth of the deposited layer. The welding current, wire feeding speed, and torch travel speed during the additive manufacturing process of TC4 titanium alloy have the greatest impact on the geometric parameters of the deposited layer. In order to study how the deposition layer width, deposition layer height, and penetration depth are affected by the welding current, wire feeding speed, and torch travel speed, this article uses Design Expert 8.0.6 software for Box−Behnken design response surface experiments. During the experimental design, the welding current, wire feeding speed, and torch travel speed are used as input variables. The deposition layer width, deposition layer height, and penetration depth are selected as the responses. We designed 17 response surface experiments that were conducted using GTAW-AM. The results show that as the welding current increases, the penetration depth and width of deposition layer gradually increase, and the deposition layer height gradually decreases. As the wire feeding speed increases, the deposition layer height and penetration depth gradually increase, and the wire feeding speed has a minimal effect on the deposition layer width. As the torch travel speed increases, the penetration depth, width and height of deposition layer gradually decrease. The response surface method experimental design can also optimize the matching of three process parameters: welding current, wire feeding speed, and torch travel speed, thereby obtaining the optimal matching range of process parameters. Within the optimized matching range of process parameters, a welding current of 90 A, a wire feeding speed of 900 mm/min, and a torch travel speed of 200.18 mm/min were selected to prepare TC4 titanium alloy thin-walled part. The microstructure of the top, middle and bottom are all basketweave structure. The α phase gradually becomes coarse from the top to the bottom. The microhardness of the top, middle, and bottom of the thin-walled parts is 362.7 HV, 352.7 HV, and 340.5 HV, respectively. The horizontal tensile strength is 926.1 MPa, with an elongation of 12.22%, and the vertical tensile strength is 938.1 MPa, with an elongation of 14.41%.

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“…It was once deemed a non-weldable material. Jong et al [21,22] delved into compositional segregation in gas tungsten arc welded (GTAW) Fe24.2Mn3.4Cr0.44C austenitic HMnS, revealing the mechanism by which GTAW welding affects strain hardening rate and strain rate sensitivity. Currently, the repair/remanufacturing of HMnS often involves using a small current, low speed, intermittent welding method.…”

Section: Introductionmentioning

confidence: 99%

Study on Erosion Behavior of Laser Wire Feeding Cladding High-Manganese Steel Coatings

Guo,

Zhang,

et al. 2023

Materials

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High-manganese steel (HMnS) coating was prepared using laser wire feeding cladding technology. Erosion damage behavior and erosion rate of both the HMnS coating and the HMnS substrate were investigated at room temperature using an erosion testing machine. SEM/EDS, XRD, EPMA, and microhardness analyses were used to characterize the cross sections of the coating and matrix, as well as the morphology, phase composition, and microhardness of the eroded surface. The phase composition, orientation characteristics, and grain size of the eroded surfaces of both the coating and substrate were examined by using the EBSD technique. The erosion mechanism under different erosion angles was revealed. By analyzing the plastic deformation behavior of the subsurface of the HMnS coating, the impact hardening mechanism of the high-manganese steel coating during the erosion process was investigated. The results demonstrated that the HMnS coating, prepared through laser wire feeding cladding, exhibited excellent metallurgical bonding with the substrate, featuring a dense microstructure without any cracks. The erosion rate of the coatings was lower than that of the substrate at different erosion angles, with the maximum erosion rate occurring at 35° and 50°. The damage to the coating and substrate under low-angle erosion was primarily attributed to the micro-cutting of erosion particles and a minor amount of hammering. At the 90° angle, the dominant factor was hammering. After erosion, the microhardness of both the coating and substrate sublayer increased to 380HV0.3 and 359HV0.3, respectively. Dendrite segregation, refined grains, low-angle grain boundaries, and localized dislocations, generated by laser wire feeding cladding, contributed to the deformation process of HMnS. These factors collectively enhance the hardening behavior of HMnS coatings, thereby providing excellent erosion resistance.

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Microstructure and Mechanical Properties of Gas Tungsten Arc Welded High Manganese Steel Sheet

Cited by 12 publications

References 51 publications

Microstructure, non-metallic inclusions and impact toughness of high-Mn cryogenic steel weld metal

Microstructure, non-metallic inclusions and impact toughness of high-Mn cryogenic steel weld metal

Study on the Relationship between Process Parameters and theFormation of GTAW Additive Manufacturing of TC4 Titanium Alloy Using the Response Surface Method

Study on Erosion Behavior of Laser Wire Feeding Cladding High-Manganese Steel Coatings

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