About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
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| Symposium
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Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
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| Presentation Title |
Real-Time Infrared Thermography on Inconel 718 With CT scan & Surface Roughness Analysis
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| Author(s) |
Aniqa Q Lim, Santosh K Rauniyar, Ben Xu, Lori Hathon, Venkat Selvamanickam, Francisco C. Robles Hernandez |
| On-Site Speaker (Planned) |
Aniqa Q Lim |
| Abstract Scope |
Thin walls of Inconel 718 were manufactured via laser-directed energy deposition (DED-L) process equipped and monitored using an infrared camera for real-time thermography. Thermographic assessment of melt pools was performed with different process parameters: laser power, scanning speed and scan patterns. Maximum melt pool temperatures were found to change with geometry, height, volume, pattern. The melt pool increases by 92 % when laser power was increase from 200W to 400W and the length decreased by 34%for scanning speeds from 720 mm/min to 920 mm/min. those morphologies are key to understand the uniformity. The results were compared to ex-situ CT scan images with in-situ spatial-temporal melt pool signatures in a layer-by-layer-manner. A robust correlation was formed between processing and defects such as porosity and surface roughness. The roughness decreases with higher peak powers (Ra =142) and by slower scan speeds (Ra=73). Making it a suitable process for in-situ/in-operando quality control. |