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Publications (3/3 displayed)
- 2022Machinability of the 18Ni300 Additively Manufactured Maraging Steel Based on Orthogonal Cutting Testscitations
- 2022Mechanical and microstructural characterisation of bulk Inconel 625 produced by direct laser depositioncitations
- 2022Mechanical and microstructural characterisation of Inconel 625-AISI 431 steel bulk produced by direct laser depositioncitations
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article
Mechanical and microstructural characterisation of bulk Inconel 625 produced by direct laser deposition
Abstract
Direct laser deposition (DLD) is an advanced additive manufacturing (AM) technology with growing industrial importance. In the present study, the mechanical and microstructural characterisation of a bulk produced by DLD depositing a nickel superalloy (type Inconel 625) on 42CrMo4 structural steel was performed. Optimized pro-cessing parameters (laser power, scanning speed and feed rate) were used for deposition and remained constant during bulk production. The bulk showed structural integrity, with no cracking or unmelted particles. Successive layers were deposited on a pre-heated substrate to reduce the cooling rate and minimize both the formation of metastable phases in the heat-affected zone and the dimensions of the deleterious phases in bulk. The bulk microstructure mainly consists of a coarse columnar/dendritic structure, and the longitudinal section micro-structure revealed the layer-by-layer deposition pattern. Microstructural and mechanical characterisation demonstrated that a sound bulk was formed, with mechanical properties similar to wrought Inconel 625. These results contribute to the recognition of DLD as a suitable technique for the repair and remanufacturing of in-dustrial components.