Experimental investigations on the multi-layered SS316L wall fabricated by CMT-based WAAM: Mechanical and microstructural studies

Senthil, T.; Babu, S. Ramesh; Puviyarasan, M.; Balachandar, V.

doi:10.1016/j.jalmes.2023.100013

Cited by 6 publications

(2 citation statements)

References 20 publications

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“…However, current trend is also towards more ecological production and cost-saving through material saving. One of the most important technologies of the last years is Additive Manufacturing (AM) [1][2][3]. AM uses a digital platform to apply material layer by layer to produce the resulting 3D component.…”

Section: Introductionmentioning

confidence: 99%

Study of Multilayer Welded Structure Made of AISI 316LSi Using WAAM

2024

Teh. vjesn.

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The current era makes a pressure on more ecological and economical production, therefore technological innovations are required. Current trend is to use additive manufacturing, which saves production time and reduces the amount of waste. That also contributes to better utilization of raw materials. This paper deals with the analysis of multilayer weld made of AISI 316LSi using WAAM. The aim was to evaluate the integrity of this component via structural analysis. A pipe was welded up and the cross-section of the pipe was analysed using optical microscopy and scanning electron microscopy. The microstructure of the weld metal revealed a dendritic morphology. The dendrites were formed by austenite and the interdendritic space contained δ-ferrite. The boundaries of individual weld layers were sharp and without the presence of an annealed area. SEM-EDS analysis was used in order to obtain maps of the elements distribution in examined microstructure. Globular particles were observed in the microstructure. These particles were identified as oxides rich in silicon and manganese. The mechanical properties were evaluated using microhardness measurement in vertical line and three horizontal lines of the wall. It was found that the microhardness values in the top and middle part of the wall are higher on the inside of the component due to cooling conditions.

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Section: Introductionmentioning

confidence: 99%

Study of Multilayer Welded Structure Made of AISI 316LSi Using WAAM

2024

Teh. vjesn.

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“…A variety of AM technologies are available for producing Inconel 625 alloy components, including powder bed fusion, laser engineered net shaping, and wire arc additive manufacturing (WAAM) [11,12]. WAAM is a type of directed energy deposition process which is widely accepted and most effective alternative for casting and machining [13]. WAAM provides more design freedom, significant savings in time and cost, better buy-to-fly ratio, enhanced material properties achieved by controlled heating and cooling rates, and good repair and modification capabilities.…”

Section: Introductionmentioning

confidence: 99%

Microstructural characterization and mechanical properties of Inconel 625 wall fabricated by GTAW-based WAAM using stringer bead and circular weave pattern

Akash,

Puviyarasan,

Senthil

et al. 2023

Eng. Res. Express

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In this work, Inconel 625 alloy was used to manufacture walls using the Wire Arc Additive Manufacturing (WAAM) technology, which is based on Gas Tungsten Arc Welding (GTAW). The wall was fabricated using a circular weave and stringer bead pattern. Microstructural analysis and tensile characteristics were evaluated for both walls. Using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and elemental mapping, the fracture zones of the tensile specimens were examined. The microstructure is mostly made up of equiaxed dendrites, with the rare presence of continuous and discontinuous cellular dendrites along the cross-section. In tensile tests, circular weaved walls performed better than stringer bead walls. The circular weave specimen had an ultimate tensile strength (UTS) of 762 MPa in the horizontal and 722 MPa in the vertical orientations. Also, the Inconel 625 wall showed anisotropic behavior (5.3%) during tensile testing. The fracture morphology analysis revealed that all the specimens were fractured as a result of large plastic deformation, corresponding to ductile failure. Based on the EDS results, the fracture zone mainly consists of Ni and Cr with a small percentage of Nb and Mo. The absence of laves phases makes the fracture mode ductile. The elemental mapping shows uniform dispersion of Ni and Cr within the fracture region, further supporting the ductile failure mode.

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