Research Group Computed Tomography

University of Applied Sciences Upper Austria - Research & Development Ltd.

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Multi-scale computed tomography for 3D-characterisation of heterogeneous metallic materials

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01.10.2009 - 30.09.2010

Determination of the 3-dimensional (3D) distribution of heterogeneities and structures is an issue of primary concern in the field of material characterisation and quality control. Heterogeneities may create exploitable property profiles, but can also degrade reliability and therefore are to be classified as defects. The quantitative description of heterogeneities is a prerequisite for evaluating their effects and their potential for strengthening or degradation. The knowledge of size, shape, location and arrangement of heterogeneities allows to evaluate the quality of materials and work pieces. To date, X-ray computed tomography (XCT) is the method to measure inner or hidden structures without destroying the specimen. The size and topology of different types of heterogeneities can vary over a wide range. The different size scales of the heterogeneities and of the affected material volume require appropriate tomographic methods and resolutions, such as industrial XCT (>10 µm), microfocus X-ray tomography “µ-XCT” (>3 µm), nanofocus XCT “nano-XCT” (>0.5 µm), synchrotron tomography “s-XCT” (>0.1 µm), or destructive focussed ion beam tomography FIBT (>10 nm). The indicated resolution limits scale with the maximum transmitted distance, which limits the specimen size to about 1000x resolution limit. Application related 3D characterisation of structural materials therefore requires multi-scale tomography.

Last Updated on Tuesday, 26 June 2012 13:28 Read more...
 

SimCT - Simulation of an industrial cone beam computed tomography system

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01.10.2006 - 30.09.2009

The measurement quality of computed tomography (CT) and especially cone beam CT is affected by the used measurement parameters of the CT system and the measurement condition. The generation of optimal measurement parameters is an optimisation process, which is typically solved by an experienced CT user, but now an simulation tool should do this selection to make the results more objective and generate a user independent quality.

Last Updated on Friday, 06 August 2010 07:17 Read more...
 

ARAPICO - Computed Tomography and Rapid Prototyping technologies for the duplication of archaeological findings

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2006 - 2007

Commonly used techniques for the reporduction of valuable archaeological findings could often damage it.
Information about the techonlogical mode of operation is gained by demounting. Damage is done to the finding and valuable information could be lost.

Last Updated on Wednesday, 24 March 2010 10:14 Read more...
 

IPCOCT - In-Process Control with Optical Coherence Tomography

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2004 - 2006

The two-year research project dealt with the expansion of an new non destructive, imaging measurement method for the industrial production of micro parts. Computed tomography has been used as an reference method. Within the 6th framework program of the European Community this CRAFT project „In Process Control with Optical Coherence Tomography“ has been processed. The overall funded budget was 1,45 Mio €.

Last Updated on Friday, 02 October 2009 18:47 Read more...
 
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