Additive manufacturing with powder as an additive
| Reference number | |
| Coordinator | GKN AEROSPACE SWEDEN AB - Avd 9634JA |
| Funding from Vinnova | SEK 2 360 000 |
| Project duration | July 2015 - February 2018 |
| Status | Completed |
Purpose and goal
The objective is to increase the knowledge of SLM and blown powder produced material in alloys Inconel 718 and Carpenter 21-6-9, in order to allow the material to be used in an aerospace context. The goal for the project is to investigate microstructure and levels of defects in SLM material for given process parameter windows, mechanical and welding properties for the materials.
Expected results and effects
Investigations on Inconel 718 SLM reviled the relation between lack of fusion and porosities as a function of supplied melting energy for two powder layer thicknesses. Research regarding weldability of Inconel 718 showed that the material was more inclined to produce welding cracks after HIP (hot isostatic pressing) than the same material but not processed with HIP. A result not expected but important in understanding Inconel 718 SLM material.
Planned approach and implementation
The project was set up as a collaboration between GKN Aerospace engine systems, University West and TWI (The Welding Institute) as manufacturer of test material. University West made all microstructural investigations and material tests and GKN has supplied the project with applications and also with project lead. The collaboration has led to increased understanding at GKN of research possibilities at University West helping GKN to plan research and product development inside the AM (Additive Manufacturing) field.