Elemental Analysis and Classification of Molten Aluminum Alloys by LIBS

The rapid, online, real-time analysis ofMolten aluminum molten aluminum alloysAluminum alloys without sample preparation is required for saving time and energyEnergy in alloyAlloys production. LIBSLIBS is a fast, easy to use, and sensitive analysis technique compared to other spectroscopic techniques. In this study, Al 6028 and Al7075 series alloysAlloys were analyzed with LIBSLIBS system developed at ST Advanced Research Center. For measurements, a diode pumped Nd:YAG with 100 mJ energyEnergy, 4.4 ns pulse length, 10 Hz repetition frequency, and a Czerny Turner type spectrometer with a 0.1 nm resolution were integrated into the ST LIBSLIBS system. A customized tube was utilized to focus the laser pulses into 700 °C molten aluminumMolten aluminum using a 50 cm focal length lens. Under argon gas pressure, spectral measurements were made through the molten aluminumMolten aluminum in the furnaceFurnace. Principle Component Analysis (PCA) technique was used for the classification of aluminum alloyAluminum alloys types. The different alloyAlloys series are clustered in different regions via PCA technique. This marks STLIBS’s first productive outcome from a high-temperatureHigh-temperature analysis.