Novel Characterization Techniques for Additive Manufacturing Powder Feedstock

被引:6
|
作者
Young, Benjamin [1 ]
Heelan, Joseph [1 ]
Langan, Sean [1 ]
Siopis, Matthew [2 ]
Walde, Caitlin [1 ]
Birt, Aaron [1 ]
机构
[1] Solvus Global, Worcester, MA 01605 USA
[2] US Army, Res Lab, Aberdeen, MD 21005 USA
关键词
additive manufacturing; metal powders; cermet powders; characterization; cold spray; COLD-SPRAY DEPOSITION; HEAT-TREATMENT;
D O I
10.3390/met11050720
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Additive manufacturing is a rapidly expanding field, encompassing many methods to manufacture parts and coatings with a wide variety of feedstock. Metal powders are one such feedstock, with a range of compositions and morphologies. Understanding subtle changes in the feedstock is critical to ensure successful consolidation and quality control of both the feedstock and manufactured part. Current standards lack the ability to finely distinguish almost acceptable powders from barely acceptable ones. Here, novel means of powder feedstock characterization for quality control are demonstrated for the solid-state AM process of cold spray, though similar methods may be extrapolated to other additive methods as well. These characterization methods aim to capture the physics of the process, which in cold spray consists of high strain rate deformation of solid-state feedstock. To capture this, in this effort powder compaction was evaluated via rapidly applied loads, flowability of otherwise non-flowable powders was evaluated with the addition of vibration, and powder electrical resistivity was evaluated through compaction between two electrodes. Several powders, including aluminum alloys, chromium, and cermet composites, were evaluated in this effort, with each case study demonstrating the need for non-traditional characterization metrics as a means of quality control and classification of these materials.
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收藏
页数:19
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