Mechanical and microstructural characterisation of bulk Inconel 625 produced by direct laser deposition

• Type: Article in International Scientific Journal
• Date: 2022

Authors

André A. Ferreira (Author) FEUP; Ana Reis (Author) FEUP; Rui L. Amaral (Author) Other; João M. Cruz (Author) Other; Pedro C. Romio (Author) Other; Jorge O. Seabra (Author) Other; Manuel Fernando Vieira (Author) FEUP

Journal

The Journal is awaiting validation by the Administrative Services.

Title: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

Vol. 838

Pages: 1-12

ISSN: 0921-5093

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Other information

Authenticus ID: P-00W-3YA

DOI: 10.1016/j.msea.2022.142777

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12