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Demir, A.; Urk, D. K.; Akben, K.; Dogan, M.; Pehlivan, E.; Yalcin, O.; Kistan, M. A.; Gokce, G.; Obali, A.
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<subfield code="a"><p>The rapid, online, real-time analysis of molten aluminum alloys without sample preparation is required for saving time and energy in alloy production. LIBS is a fast, easy to use, and sensitive analysis technique compared to other spectroscopic techniques. In this study, Al 6028 and Al7075 series alloys were analyzed with LIBS system developed at ST Advanced Research Center. For measurements, a diode pumped Nd:YAG with 100 mJ energy, 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 LIBS system. A customized tube was utilized to focus the laser pulses into 700 degrees C molten aluminum using a 50 cm focal length lens. Under argon gas pressure, spectral measurements were made through the molten aluminum in the furnace. Principle Component Analysis (PCA) technique was used for the classification of aluminum alloy types. The different alloy series are clustered in different regions via PCA technique. This marks STLIBS's first productive outcome from a high-temperature analysis.</p></subfield>
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<subfield code="a">Elemental Analysis and Classification of Molten Aluminum Alloys by LIBS</subfield>
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