Dissimilar laser cladding of Inconel 718 powder on A-286 substrate: Microstructural evolution
Source abstract
Abstract
In this work, laser cladding of a Ni-based superalloy powder (Inconel 718) on a Fe-based superalloy (A-286) substrate was performed. The microstructural evolution was studied by optical and electron microscopy techniques, aided by energy dispersive spectroscopy. Additionally, the microhardness along the as-deposited parts was analyzed and correlated with the observed microstructure. It was found that other than austenitic dendrites, Nb-rich carbides, interdendritic Laves networks, and Ti (C, N) were formed; the latter was aided by the presence of pre-existing TiC particles in the substrate. Additionally, a slag oxide layer was seen on the clad surface of the fusion zone. The formation mechanisms of an unmixed zone in the shape of beach and peninsula are discussed.
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Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · High Entropy Alloys Studies · Welding Techniques and Residual Stresses
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials and Metallurgical Engineering, Amirkabir University of Technology 1 , Tehran, Iran
Faculty of Materials and Manufacturing Engineering, Malek-Ashtar University of Technology 2 , Tehran, Iran
Department of Mechanical and Industrial Engineering, NOVA School of Science and Technology, UNIDEMI, Universidade NOVA de Lisboa 3 , Caparica, Portugal
CENIMAT/I3N, Materials Science Department, NOVA School of Science and Technology, Universidade NOVA de Lisboa 4 , Caparica, Portugal
Funding
Fundação para a Ciência e a Tecnologia
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