Advanced Materials

we provide

Non Destructive Testing X Ray Computed Tomography

for Industries in the areas of:

• flaw detection,

• failure analysis,

• metrology,

• assembly analysis, and

• reverse engineering applications.

 

for information/cooperation contact: This email address is being protected from spambots. You need JavaScript enabled to view it. Mr. Anestis Papadopoulos CEO

 

 

General info

Non Destructive Testing is a wide group of analysis techniques, used in science and industry to evaluate the properties of a material, component or system without causing any damage. It is a highly valuable technique that can save both money and time in product evaluation, troubleshooting, and research.

NDT is divided into various methods, each based on a particular scientific principle. These methods may be further subdivided into various techniques. One of these methods is Radiographic Testing, including the following techniques:

• Computed Radiography
• Digital Radiography (real-time)
• Neutron Imaging
• Small Controlled Area Radiography
• X-Ray Computed Tomography


X-Ray Computed Tomography

X-ray CT makes use of computer-processed combinations of many X-ray images, taken around a single axis of rotation, to produce cross-sectional images (virtual slices) of a scanned object, allowing the user to see inside the object without cutting.
Digital geometry processing is used, to generate a volume of data that can be manipulated to demonstrate various structures, based on their ability to block the X-ray beam. Modern scanners allow this volume of data to be reformatted in various planes or even as volumetric (3D) representations of structures.

• During the CT scan the specimen is placed on a rotary table. As it rotates, the cone of X-rays produce about 1300 2D images, which are collected by the detector. The 2D images are then processed to create a 3D volume, rendering both the external and the internal geometries of the specimen.

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3D Replicating Technique: Flexible, high-resolution 3D replicas allow surfaces to be examined and measured under laboratory conditions. A replica can be taken from any solid material.

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 Industrial                                                                 CT

scanning can be used in many areas of industry for internal inspection of components. Key uses for CT scanning are:
• flaw detection,
• failure analysis,
• metrology,
• assembly analysis, and
• reverse engineering applications.


Analysis/Inspection Techniques – Expertise

Assembly
One of the most recognized forms of analysis using CT, is assembly or visual analysis. For industrial CT scanning, the ability to see inside a component is beneficial since internal components can be seen in their functioning position. Also, devices can be analyzed without disassembly. Some software programs for industrial CT scanning allow for measurements to be taken from the CT dataset volume rendering. These measurements are useful for determining the clearances between assembled parts or the dimension of an individual feature, etc.

Part comparisons (part to part / part to CAD)
In today’s market, parts can be manufactured around the world: designed in one country, machined in another and assembled in a third. Verification of the part to the original CAD is critical, especially if the part is to be used in an assembly. Industrial CT allows for comparison of parts to one another or parts to CAD data. The deviations for both external and internal geometries can be shown on a surface color map of the 3D representation or by whisker plots in the 2D windows. This process is beneficial when comparing the same part from various suppliers, studying the differences in parts from one cavity to another cavity of the same mold, or verifying the design to the part itself.

Void, crack & defect detection
Metal casting and molded plastic components are typically prone to porosity, because of cooling processes, transitions between thick and thin walls, and material properties. CT scanning can detect internal features and flaws, displaying this information in 3D without destroying the specimen. Void analysis can be used to locate, measure, and analyze voids inside plastic or metal components. In certain software programs the porosity within the specimen is categorized by color, based on the voids’ respective sizes.

Generation of CAD data for reverse engineering requirements
A CAD file can be generated from the CT data set, which is particularly useful in reverse engineering applications and product development. Exported CAD file formats are recognized by many software such as CAD, FEA, and CFD. The CAD file created by CT scanning can not only show the external components, but the internal as well. This allows for rapid prototyping of internal components without creating an entirely new CAD file by hand.

Geometric dimensioning & tolerance analysis
Industrial CT scanning allows for full metrology of the CT datasets, allowing for geometric dimensioning and tolerance analysis to meet the production part approval process requirement. In particular, damage tolerance analysis of composite materials can prevent local de-bonding and fiber breakage.

Examples of Specific Specimen Analysis

Inspection Reconstructed                                                                      Inspection Reconstructed

Geometry                                                                                              Geometry

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GFRP                                                                                                 Aluminum Foam

 

the Tomoscope

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Werth Tomoscope HV Compact 225 3D CNC

 

Glossary:
CAD: Computer Aided Design,
CFD: Computational Fluid Dynamics
CNC: Computer Navigated Control
CT: Computed Tomography
FEA: Finite Elements Analysis
GD&T: Geometric Dimensioning and Tolerance
NDT: Non Destructive Testing
PPAP: Production Part Approval Process
RT: Radiography Testing
SCAR: Small Controlled Area Radiography