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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/11776
Title: Investigation on microstructure and mechanical properties of the dissimilar weld between mild steel and stainless steel-316 formed using microwave energy
Authors: Bansal A.
Sharma, Apurbba Kumar
Kumar, Pradeep
Das S.
Published in: Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
Abstract: Dissimilar weld between a mild steel and a stainless steel-316 was formed by exposing the candidate materials to electromagnetic radiation in the microwave band. Characterisations of the joints were carried out with respect to some aspects of microstructural and mechanical properties of the fusion joints. The joining trials were carried out in an industrial microwave applicator at a fixed frequency of 2.45 GHz and 1.2kW power while exposed for a duration of 600 s in atmospheric condition. Stainless steel-316 powder was used as the filler material for joining. Principles of microwave hybrid heating were utilised for heating and subsequently melting the metal-based materials in the joint zone. Characterisation of the microwave hybrid heating'induced dissimilar welds were carried out using X-ray diffraction, field emission scanning electron microscopy, microhardness tester and universal testing machine. The presence of carbides and intermetallic in the joint zone were evidenced in the X-ray diffraction results. The microstructures observed through scanning electron microscope show the metallurgical bonding between the substrates to be joined through complete melting of the powder particles and fusion of the base materials. The Vicker's microhardness in the core of the joint was observed to be 380HV, which was significantly higher as compared to the base materials due to the formation of dendritic structure and various carbides in the joint zone during microwave hybrid heating process. The average ultimate tensile strength of the joints was measured to be 420 MPa with an elongation of 6.67%. The average flexural strength of the joints was observed to be 787.5 MPa with an elongation of 5.14%. The optimum temperature required for joining was measured using an in-built non-contact infrared pyrometer and was found to be 1360 °C. © IMechE 2014.
Citation: Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture (2016), 230(3): 439-448
URI: https://doi.org/10.1177/0954405414558694
http://repository.iitr.ac.in/handle/123456789/11776
Issue Date: 2016
Publisher: SAGE Publications Ltd
Keywords: Dendritic structure
Dissimilar welding
Hybrid heating
Microhardness
Microwaves
ISSN: 9544054
Author Scopus IDs: 36144920800
55434064300
55952759400
56298971800
Author Affiliations: Bansal, A., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Sharma, A.K., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Kumar, P., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Das, S., Reactor Control Division, BARC, Mumbai, India
Corresponding Author: Bansal, A.; Department of Mechanical and Industrial Engineering, Indian Institute of Technology RoorkeeIndia; email: amit.bansal978@gmail.com
Appears in Collections:Journal Publications [ME]

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