Study on cladding of Inconel 718 on mild-steel substrate using CMT-WAAM
Wire Arc Additive Manufacturing (WAAM) is a promising technique for fabricating free-form components and cladding exotic materials such as nickel-based superalloys, which have exceptional corrosion and wear properties. However, the high cost of Ni–Cr-based Inconel alloys limits their use. Therefore,...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-05-01
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| Series: | Results in Surfaces and Interfaces |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666845925001412 |
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| Summary: | Wire Arc Additive Manufacturing (WAAM) is a promising technique for fabricating free-form components and cladding exotic materials such as nickel-based superalloys, which have exceptional corrosion and wear properties. However, the high cost of Ni–Cr-based Inconel alloys limits their use. Therefore, cladding these alloys onto cheaper materials with similar mechanical properties could provide a cost-effective solution for tillage tools and similar applications. In this study, single-layer Inconel 718 was cladded onto a mild steel substrate using a CMT-based WAAM technique. Microstructural, mechanical, and wear studies were conducted to assess the quality of the clad. Initially, the cladding parameters and offsets were determined through several trial experiments. A clear, sharp interface line was observed using optical and scanning electron microscopy, indicating minimal dilution, which is crucial for the structural integrity of the cladded specimens. The microstructure of the Inconel 718 clad region exhibited an equiaxed dendritic structure in the middle and a columnar dendritic structure near the interface, while the mild steel substrate showed an equiaxed structure of ferrite and pearlite. Microhardness studies revealed that microhardness increased from the substrate region towards the interface, reaching a maximum in the clad region. Tensile specimens were tested from the clad, interface, and substrate regions, with the Inconel 718 clad showing higher tensile properties than both the substrate and interfacial regions. Inconel 718 cladded mild steel demonstrated superior wear behaviour. |
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| ISSN: | 2666-8459 |