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 |
Origin and Evolution of Defects during Sintering in Binder-Jet Printed 625 Alloy |
Author(s) |
Chuyuan Zheng, Markus Chmielus, Ian Nettleship |
On-Site Speaker (Planned) |
Markus Chmielus |
Abstract Scope |
When applied to powder metals, binder-jet 3D printing creates porous green structures where different defect types co-exist and may survive sintering. Previous work illustrated a variety of defects introduced during printing process, but how each type of defect evolves during sintering and to what extent the defect survives remain unclear. In this work, three-dimensional characterization using micro-computer tomography is applied to binder-jetted and subsequently sintered Inconel 625 alloy powders. Integrated 3D analyses along with 2D pore orientation analysis reveal the origin of different defect types during printing, and quantitatively describe their existence in the microstructure as a function of sintering conditions. Moreover, 3D measurements also provide critical data to establish a 3D microstructure pathway for the sintered binder-jetted powder metal. |