| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
|
| Presentation Title |
Investigation of Gradient Alloy Composition Measurement with LIBS: Towards In Situ Composition Monitoring in Additive Manufacturing |
| Author(s) |
Jacob Spencer, Brian Squires, Brandon McWilliams, Kyu Cho, Narendra Dahotre, Andrey Voevodin |
| On-Site Speaker (Planned) |
Jacob Spencer |
| Abstract Scope |
The feasibility of laser-induced breakdown spectroscopy (LIBS) assisted by predictive spectra modeling was investigated for in situ composition analysis in additive manufacturing of functionally graded materials (FGM). The composition gradient of an Al-Cu sputtered thin film sample surface was measured first by energy-dispersive X-ray spectroscopy (EDS), then with a series of LIBS measurements. It was found that the composition as measured by LIBS had an average error of 1.4% compared to the EDS data after a constant correction factor was applied. The composition analysis rate was greater than 10 Hz, which makes this method compatible for in situ monitoring of alloy processing in DED. Furthermore, an optimum number of pulses was investigated for accurate composition measurement. The results demonstrate that LIBS is a promising method for composition measurement of graded alloys with potential applications for additive manufacturing of FGM parts. |