Evaluation of Liquid/Solid Interfacial Property for Ti–6 mass%Al–4 mass%V Alloy Using Electron-Beam Additive Manufacturing

Abstract

One of the important physico-chemical properties of materials under metal additive manufacturing process is the interfacial properties of liquid/solid such as the wettability between a liquid and its own solid. However, the data of the wettability between a liquid and its own solid for metal systems is limited. In this study, we propose the evaluation method for the interfacial properties between liquid alloy and its solid alloy based on the morphology of as built surface in powder bed fusion. The liquid/solid contact angle for Ti–6 mass%Al–4 mass%V is measured based on the sample built by electron-beam additive manufacturing, and its interfacial tension is evaluated by Young’s equation. The contact angle and interfacial tension between Ti–6 mass%Al–4 mass%V liquid alloy and its solid alloy are found to be 12° and 376 mN/m, respectively.

 

This Paper was Originally Published in Japanese in J. JILM 72 (2022) 304–307.

Fig. 3 Three-dimensional morphology of solid alloy particle and liquid alloy on side wall surface observed by laser microscope.