1. Microstructure and mechanical properties of Inconel-625 slab component fabricated by wire arc additive manufacturing.
- Author
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Ravi, G., Murugan, N., and Arulmani, R.
- Subjects
MICROSTRUCTURE ,MECHANICAL behavior of materials ,THREE-dimensional printing ,X-ray diffraction ,OXYACETYLENE welding & cutting - Abstract
Wire arc additive manufacturing is a promising reliable free-form fabrication technique suitable for producing large-scale components that feature a very low buy-to-fly ratio. This research work is aimed to fabricate a rectangular prototype Inconel-625 alloy slab using a robotic metal inert gas welding system. The microstructure and mechanical properties of as-deposited and solution-annealed (SA) alloys were investigated. It was found that the as-deposited alloy exhibited a columnar dendritic structure and the presence of intermetallic phases such as the Laves phase, NbC and carbides were observed in the gamma-nickel matrix. In SA deposit, the intermetallic phases were dissolved in the NiCr-matrix and the secondary carbides M
23 C6 , M6 C were also observed in the microstructure. It was found that the ultimate tensile strength and microhardness of the as-deposited alloy were higher than that of SA deposit. [ABSTRACT FROM AUTHOR]- Published
- 2020
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