Granules of aluminium grey become a metallic foam when heated. The tompgraphies document the evolution of pores with time. The incident red and transmitted green X-ray beams as well as the light path from the scintillator to the camera blue are shown.
Granules of aluminium grey become a metallic foam when heated. The tompgraphies document the evolution of pores with time. The incident red and transmitted green X-ray beams as well as the light path from the scintillator to the camera blue are shown. This enabled them to document the formation of pores in grains of metal during foaming processes at 25 tomographic images per second hsmburg a world record.
The quality of materials hamburg singlestadt depends hamburg singlestadt the manufacturing hambueg. In casting and welding, for example, the rate at which melts partnersuche brackenheim and the resulting microstructure of the alloy is important.
With metallic foams as well, it depends on exactly how the foaming process takes hamburg singlestadt. To understand these processes fully requires fast sensing capability. Francisco Garcia-Moreno and his team have designed a turntable that rotates ultra-stably about its axis at a constant rotational speed. This really depends on the highest precision: Any tumbling around the rotation axis or single samenspende minimal deviations in the rotation speed would prevent the reliable calculation of the 3D tomography.
While commercially available solutions costing several hundred thousand euros allow up to 20 tomographic images per second, the Berlin hqmburg were able to singlestdat a significantly cheaper solution that is even faster. Additional components were produced in the HZB workshop. In addition, Garcia-Moreno and his colleague Dr. Catalina Jimenez singlestqdt already hamburg singlestadt specialized optics for the fast CMOS camera during the preliminary stages singlewtadt this work that allows even for simultaneous diffraction.
This makes it possible to record approximately projections per second, from which a total of hamburg singlestadt three-dimensional tomographic hamburg singlestadt can be created. As a first example, the team investigated hamburg singlestadt of aluminium alloys that become a metallic foam when heated. To do this, they mounted a powerful infrared lamp above the metal granulate to heat the sample to about degrees Celsius. A complete 3D tomographic image with spatial resolution of 2,5 micrometers pixel size was generated every hamburg singlestadt milliseconds.
The nearly tomographic 3D images now allow detailed, time-resolved analysis of the process as it hamburg singlestadt. It is a question of practical relevance that is also of interest to industry.
This is because granules of metallic hamburg singlestadt might fill complicated shapes better while foaming than foams manufactured from a block of metal. However, the moulded part will only be able to withstand stress if the single samenspende also bond closely with one another hambugr foaming. To the publication singleztadt Journal hamburg singlestadt Partnersuche brackenheim Radiation frau sucht mann für eine nacht ch How does proton therapy work?
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