MECHANICAL AND MORPHOLOGICAL FEATURES OF MICROWAVE HYBRID HEATING-INDUCED WELDING OF SS304 STAINLESS STEEL WITH COKE AS A SUSCEPTOR
- Authors
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O.O. Ojo,
The Federal University of Technology, Akure, P.M.B. 704, Ondo state, Nigeria
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B.V. Eyiowuawi,
The Federal University of Technology, Akure, P.M.B. 704, Ondo state, Nigeria
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J.F. Akinfolarin,
The Federal University of Technology, Akure, P.M.B. 704, Ondo state, Nigeria
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- Keywords:
- microwave welding, stainless steel, microstructure, mechanical properties, fracture
- Abstract
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Electromagnetic radiation-assisted welding is an evolving welding process that has not been fully explicated in literature, considering the numerous arrays of existing materials. Based on this understanding, the eco-friendliness, energy conservation, and other benefits of this new welding method, this study was engineered. The paper studies the microwave hybrid heating technique in welding the austenitic SS304 stainless steel plates by utilizing a coke susceptor, Ni interface powder, and a sodium silicate-bound silica sand refractory over different microwave exposure times. The structural morphologies, tensile strength, hardness, and fracture behavior of the resultant SS304 joints were studied. The findings show that an increase in the microwave exposure time (15-18 min) causes a slight disparity in the proportion of elemental diffusion at the weld interfacial region. The prolonged microwave irradiation (16 - 18 min) improved the interface microhardness (135.51 - 160.45 HV) and the tensile strength (10.95 - 16.41 MPa) of the welded SS304 joints. This occurrence is associated with the improvement in the thermal-induced interdiffusion effect as the microwave volumetric heating is prolonged. The welds failed via the brittle failure mode, irrespective of the level of microwave exposure time.
- Author Biographies
- References
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- Published
- 2026-11-27
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