About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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Additive Manufacturing: Mechanisms and Mitigation of Aqueous Corrosion and High-temperature Oxidation
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Presentation Title |
Corrosion Behavior of Additively Manufactured Parts Made Using Non-spherical Ti-6Al-4V Powder in 3.5 wt% NaCl Solution |
Author(s) |
Sourabh Dilip Bagi, Muktesh Paliwal, Anthony D Rollett, Amir Mostafaei |
On-Site Speaker (Planned) |
Amir Mostafaei |
Abstract Scope |
In powder bed additive manufacturing, feedstock and processing affect final microstructure and properties of 3D-printed parts. While numerous studies have evaluated 3D-printing of spherical powder, very limited research has been carried out on the processing of the non-spherical feedstock. This study is targeted specifically to the use of non-spherical, HDH (Hydride-DeHydride), Ti-6Al-4V powders in the L-PBF process. Two different post-heat treatments including hot isostatic pressing and solution treatment are applied. The microstructures, potentiodynamic curves, and electrochemical impedance spectroscopy methods are characterized for L-PBF processed and post-treated HDH Ti-6Al-4V specimens. Though as-built part exhibit anisotropic microstructure (i.e., lamellar α + acicular α’ + β phases) and corrosion behavior compared to ASTM standard wrought Ti-6Al-4V, post processings results in homogenized grain structures and enhanced corrosion behavior. Constituent phases, grain size, and morphology directly determine the corrosion resistance of the resulting parts. |