|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location-Specific Processing-Microstructure-Property Relationships
||Fundamental Study of the Effect of Process Variables in LMD Repairs with Inconel 718
||Faye McCarthy, Chris P Heason, Gavin J Baxter, Phil Prangnell
|On-Site Speaker (Planned)
Laser Metal Deposition is an attractive process for repair of aerospace components. To optimise the quality of repaired parts it is essential to understand the effect of the process conditions on the microstructure of the deposited material, which is controlled by the local solidification conditions and thermal history the material experiences. Here, work has been carried out to study the effect of process parameters on the melt pool size and shape, powder capture efficiency, and microstructure of single and multiple overlapping LMD tracks. The data has been used to fit an FE model to the melt pool profile which has subsequently been used to understand the effects of raster strategy and sample geometry. This has revealed that there is a significant influence of beam path and sample edge, in thin walled components, on the melt pool surface and consequently the local grain structure that develops during solidification.
||Planned: Supplemental Proceedings volume