High-Energy Computed Tomography for Additive Manufacturing of Critical Metal Products

The current state of digital additive technologies and areas of their application is analyzed in the paper. The main sources and sizes of geometry errors as well as porosity of additive metal products are estimated. It is shown that post-processing of matching surfaces is necessary at assembling critical mechanical units containing additive parts. Non-destructive testing of critical additive metal articles with complex internal structure does not conform to capabilities of traditional NDT methods; new NDT problems of additive parts are formulated. A unique role of high-energy computed tomography is substantiated and experimentally confirmed; CT can become an important factor in further development of additive technologies by providing a feedback between a technology, an internal structure and performance abilities of the products.

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Feasibility Study for Application of Total-Variation-Based Noise-Removal Algorithm with 450-kVp High-Energy Industrial Computed-Tomography Imaging System for Non-destructive Testing

Experimental Techniques ◽

10.1007/s40799-018-0276-8 ◽

2018 ◽

Vol 43 (2) ◽

pp. 117-123

Author(s):

Y. Lee

Keyword(s):

Computed Tomography ◽

Imaging System ◽

Noise Removal ◽

High Energy ◽

Non Destructive Testing ◽

Computed Tomography Imaging ◽

Destructive Testing ◽

Tomography Imaging ◽

Industrial Computed Tomography ◽

Non Destructive

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X-ray microtomography

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100107058 ◽

1988 ◽

Vol 46 ◽

pp. 998-999

Author(s):

H.W. Deckman ◽

B.F. Flannery ◽

J.H. Dunsmuir ◽

K.D' Amico

Keyword(s):

Computed Tomography ◽

Internal Structure ◽

Imaging Technique ◽

Three Dimensional ◽

Tissue Structure ◽

Individual Element ◽

X Ray ◽

Non Invasive ◽

Panoramic Imaging ◽

Three Dimensional Images

We have developed a new X-ray microscope which produces complete three dimensional images of samples. The microscope operates by performing X-ray tomography with unprecedented resolution. Tomography is a non-invasive imaging technique that creates maps of the internal structure of samples from measurement of the attenuation of penetrating radiation. As conventionally practiced in medical Computed Tomography (CT), radiologists produce maps of bone and tissue structure in several planar sections that reveal features with 1mm resolution and 1% contrast. Microtomography extends the capability of CT in several ways. First, the resolution which approaches one micron, is one thousand times higher than that of the medical CT. Second, our approach acquires and analyses the data in a panoramic imaging format that directly produces three-dimensional maps in a series of contiguous stacked planes. Typical maps available today consist of three hundred planar sections each containing 512x512 pixels. Finally, and perhaps of most import scientifically, microtomography using a synchrotron X-ray source, allows us to generate maps of individual element.

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