An Assessment of the Smart Manufacturing Activities at the National Institute of Standards and Technology Engineering Laboratory Fiscal Year 2017 (2017) / Chapter Skim
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2 Measurement Science for Additive Manufacturing
2 Measurement Science for Additive Manufacturing
Pages 11-18
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From page 11... ...
The AM work in the MSAM program is aimed at developing and deploying measurement science that will enable rapid design-to-product transformation through advances in four projects: (1) Characterization of Additive Manufacturing Materials; (2)
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From page 12... ...
The project excellence is displayed, for example, in the approach to powder characterization where several different characterization techniques have been set up, including powder size distribution and shape analysis, a custom powder spreading device, different flow and density measurement devices, as well as a suite of X-ray tomography instruments for defect analysis in additively manufactured parts. The project has generated, and continues to generate, new standards on the use of this equipment to characterize powders and parts.
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From page 13... ...
If properly conducted, round robin studies distribute the cost burden of testing and provide statistically valuable information. The Real-Time Monitoring and Control of Additive Manufacturing Processes project team is working on visual monitoring of the melt pool in metal laser powder bed machines.
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From page 14... ...
The MSAM projects seem to be on a good track; however, there is a need to hone in on the measurement and standards aspect throughout the diverse range of AM topics currently pursued in the program, and the Characterization of Additive Manufacturing Materials project in particular. The round robin studies in the Characterizations of Additive Manufacturing Materials project were conducted with outside partners.
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From page 15... ...
The use of software to analyze images utilizing algorithms to understand the laser effects within the powder bed would help to improve the technology itself. Another opportunity within the Characterization of Additive Manufacturing Materials project is to examine more closely (with the inclusion of a measurement of the degree of planarity in powder spreading)
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From page 16... ...
If the depth of penetration is larger than the thickness of a melt pool, this factor would need to be taken into account. For the Systems Integration for Additive Manufacturing project, the focus on metal laser-based powder bed fusion systems is a good starting point; however, planning needs to include processes that are used more frequently today for manufacturing, such as powder bed fusion polymer systems and extrusion systems.
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From page 17... ...
The two key personnel involved with the Systems Integration for Additive Manufacturing project efforts have been recognized for outstanding contributions and collaboration and are both publishing archival journal articles and standards at an acceptable rate. Although the team is small, its size appears to be appropriate with respect to the early stage of many elements of the design rules, commercial processes, and machine development, as well as other aspects of metal laser powder bed machines.
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From page 18... ...
ADEQUACY OF FACILITIES, EQUIPMENT, AND HUMAN RESOURCES Accomplishments State-of-the-art powder characterization equipment was set up to support the Characterization of Additive Manufacturing Materials project and the cross-project availability of the AM testbed. The equipment includes a custom raking device to study the motion of powder particles during powder spreading, as well as a range of commercial equipment.
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