Veninga, David (2021) Behavior and influence of inert gas flow during selective laser melting. Design Project, Industrial Engineering and Management.
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Abstract
Selective laser melting (SLM) is an innovative additive manufacturing (AM) process capable of fabricating metal parts through addition of material. The technique, in which a high-power laser selectively scans and melts areas of a metal powder bed, offers great advantages in manufacturing complex parts at a high material utilization rate with freedom of design. During the SLM process, an inert gas is fed through the build chamber to create an inert atmosphere, and to transport unfavorable process by-products away from the laser beam and powder bed. Advanced Additive (ICD-AM), a project of the Innovation Cluster Drachten (ICD), investigates SLM’s potential within the stakeholders’ companies. Currently, they lack sufficient knowledge of the argon gas flow behavior and influence in their SLM 280HL process. This Master Design project (MDP) investigated the argon gas flow behavior and influence in the SLM 280HL process through measurements, simulations, and experiments. Gas flow behavior in front of the inlet and over the build plate was found to be nonuniform, in contrast to what was previously assumed within ICD-AM. Evaluation of 316L stainless steel experimental batches printed at different flow velocities (default flow velocity and 67% of default flow velocity) revealed significant differences in surface roughness, microstructure and porosity of the samples. The influence of inert gas flow velocity on surface roughness was further confirmed through regression analysis, in which
| Item Type: | Thesis (Design Project) |
|---|---|
| Supervisor name: | Munoz Arias, M. and Pei, Y. |
| Degree programme: | Industrial Engineering and Management |
| Thesis type: | Design Project |
| Language: | English |
| Date Deposited: | 25 Mar 2021 11:21 |
| Last Modified: | 25 Mar 2021 11:21 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/24120 |
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