About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
From Chemistry at the Scale of Printing to Bulk Quantitation: A Powerful Tool for Characterizing Additive Manufacturing Materials |
Author(s) |
Jonathan C. Putman, Peyton Willis, Madeline Martelles, Ellen Williams |
On-Site Speaker (Planned) |
Jonathan C. Putman |
Abstract Scope |
This work showcases a new technology for characterizing additive manufacturing metal materials, Laser Ablation Laser Ionization Time of Flight Mass Spectrometry (LALI-TOF-MS). LALI-TOF-MS is a powerful technique capable of trace-level quantitation for virtually the entire periodic table. The LALI ionization source eliminates many challenges associated with other techniques, and TOF-MS provides a complete mass spectrum for each laser spot. LALI-TOF-MS is capable of quantifying both trace and major elements, as well as many interstitial elements like carbon, nitrogen, and oxygen. Part of this work compares quantified results obtained for additive manufacturing metal materials with their certified values. With a spatial resolution ranging from 5-200 um, LALI-TOF-MS also provides chemical data at the same scale as the melt pool in many additive manufacturing techniques. Chemical mapping experiments demonstrate this capability and reveal localized heterogeneities in elemental and oxide composition between individual particles of metal powder feedstocks. |