|About this Abstract
||Materials Science & Technology 2019
||Additive Manufacturing: Effective Production, Characterization, and Recycling of Powder Materials
||Characterization of Nickel-base Superalloy MAR-M247 Powders by Synchrotron X-ray Computed Tomography
||Lianghua Xiong, Andrew Chuang, Peter Kenesei, Jonathan Almer, Dileep Singh
|On-Site Speaker (Planned)
Metallic powder feedstocks play the important role in the powder bed fusion based additive manufacturing (AM) processes in order to three-dimensionally build defect-free structures with complex and customized geometries. During the layer-by-layer powder spreading and printing processes, the quality of metallic powder feedstocks significantly determine the qualities of powder bed and further formed melt track. Conventional characterization tools, like optical and scanning electron microscopies, have the limitations to observe the external and internal structures of powder feedstocks simultaneously. Here, we apply three-dimensional synchrotron x-ray computed tomography to characterize the external and internal microstructure of nickel-base super alloy MAR-M247 powders for AM application. The particle size, shape and distribution of powder feedstocks produced by different methods are quantified. Size, shape, distribution of internal defects are characterized at the same time. The results obtained will benefit printing reliable, repeatable and defect-free components in powder bed fusion process.
This work was sponsored by Advanced Manufacturing Office of the U. S. Department of Energy (DOE) under Contract No. DE-AC02-06CH11357. This research used resources of the Advanced Photon Source, a DOE Office of Science User Facility operated by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
||Planned: At-meeting proceedings