3D Printing of Fuel Injector in IN718 Alloy for Missile Applications

Autor: G. Jagan Reddy, T. Raghu, V. Srinivas, M. Raghavender Rao, Saride Ramesh Kumar
Rok vydání: 2021
Předmět:
Zdroj: Transactions of the Indian National Academy of Engineering. 6:1099-1109
ISSN: 2662-5423
2662-5415
DOI: 10.1007/s41403-021-00253-8
Popis: 3D printing is a process of creating a three-dimensional solid object of virtually any shape from a digital CAD model which is fast growing from research to production technology. The present study is aimed to develop the fuel injector component using 3D printing technology for missile applications. The primary objective is to demonstrate the potential advantages of 3D printing like reduction in part assembly, elimination expensive EBW for joining, CNC machining and also EDM processes without any compromise in functional performance of the component. The re-design of fuel injector was carried out by adopting a novel design concept by modifying the features of internal chamber, thereby completely avoiding the necessity for support structures in 3D printing. Different design configurations were developed with flow optimisation and topology optimisation for weight reduction, for 3D printing of the component. Initially, a proof of concept model was successfully built in IN718 alloy powder material using PBF-based 3D printing facility at AERDC, HAL. The 3D-printed fuel injector in as-deposited condition was evaluated using X-ray 3D tomography which has revealed well-formed internal features and uniform material density without any macro pores or cracks. XRF confirmed the chemical homogeneity at different locations on 3D-printed component. Microstructural characterisation was carried out using optical microscopy (OM), SEM and EBSD analysis. The OM evaluation indicated presence of micro-porosity (
Databáze: OpenAIRE
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