期刊
ADDITIVE MANUFACTURING
卷 34, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.addma.2020.101271
关键词
Powder-bed fusion (PBF); X-ray microtomography; In situ; Synchrotron
资金
- Investments for the Future Programme [AN1-0-LABX-44-01]
X-ray microtomography can be used to characterise objects undergoing fabrication by additive manufacturing. During the layer-by-layer building process, it can provide key information about geometry, roughness and it can even reveal typical defects such as lack-of-fusion porosity, gas pores or cracks. Usually, objects are built with varied processing parameters and then characterised post-mortem. In the present work, we describe our custom-designed additive manufacturing chamber allowing in situ 3D-non-destructive characterisation to be performed during layer-by-layer construction using synchrotron X-ray microtomography. Scans before (subsequently to powder deposition) and after local laser melting are acquired for every layer. A few examples of such a characterisation demonstrate the ability of the set-up to reproduce conditions close to those used in conventional laser powder-bed fusion devices and to reveal key phenomena.
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