Experimental investigation of temperature distribution during wire-based laser metal deposition of the Al-Mg alloy 5087
Research output: Journal contributions › Conference article in journal › Research › peer-review
Authors
Wire-based laser metal deposition enables to manufacture large-scale components with deposition rates significant higher compared to powder-based laser additive manufacturing techniques, which are currently working with deposition rates of only a few hundred gram per hour. However, the wire-based approach requires a significant amount of laser power in the range of several kilowatts instead of only a few hundred watts for powder-based processes. This excessive heat input during laser metal deposition can lead to process instabilities such as a non-uniform material deposition and to a limited processability, respectively. Although, numerous possibilities to monitor temperature evolution during processing exist, there is still a lack of knowledge regarding the relationship between temperature and geometric shape of the deposited structure. Due to changing cooling conditions with increasing distance to the substrate material, producing a wall-like structure results in varying heights of the individual tracks. This presents challenges for the deposition of high wall-like structures and limits the use of constant process parameters. In the present study, the temperature evolution during laser metal deposition of AA5087 using constant process parameters is investigated and a scheme for process parameter adaptions in order to reduce residual stress induced componential distortions is suggested.
Original language | English |
---|---|
Journal | Materials Science Forum |
Volume | 941 |
Pages (from-to) | 988-994 |
Number of pages | 7 |
ISSN | 0255-5476 |
DOIs | |
Publication status | Published - 01.12.2018 |
Event | International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS - THERMEC 2018: Processing, Fabrication, Properties, Applications - Paris, France Duration: 08.07.2018 → 13.07.2018 https://thermec2018.sciencesconf.org/ |
- Engineering - Aluminium alloy, Laser Additive Manufacturing, laser metal deposition, Process Parameters, Temperature Evolution