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Microwave Butt Joining of Stainless Steel (SS-316L) With an SS-316L Powder

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Abstract

In the present work, the microwave-assisted butt joining of austenite stainless steel (SS-316L) with an SS-316L filler was investigated. The fabricated weldments were characterized in terms of phase analysis, identification of microstructural features, elemental study, microhardness, tensile and flexural properties. The results reveal a dense microstructure in the fusion zone (FZ); phase analysis reveals the presence of mainly two phases: the primary delta (δ) ferrite phase along with the Fe–Ni-based solid solution matrix. The microhardness of the FZ was measured to about 450 ± 45 HV; which is 2.05 times the base metal hardness. The weldment exhibits an ultimate tensile strength of about 495 MPa (about 95.74% of base metal strength). The flexural strength of the fabricated weldment tested on a 3-point bend test was measured to be 763.59 MPa (about 72.03% of base metal strength).

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Acknowledgements

The experimental facility established at the IK Gujral Punjab Technical University through project (SRG/2019/001182) sponsored by Science and Engineering Research Board (SERB) is gratefully acknowledged by the authors.

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Correspondence to Amit Bansal.

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Sahota, D.S., Bansal, A. & Kumar, V. Microwave Butt Joining of Stainless Steel (SS-316L) With an SS-316L Powder. Trans Indian Inst Met 76, 3303–3312 (2023). https://doi.org/10.1007/s12666-023-03009-w

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