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VOGT Test Center
Nondestructive material testing since 1983

VOGT is accredited as an independent testing laboratory according to DIN EN ISO/IEC 17025 and certified according to ISO 9001 for industry and EN 9100 for aviation. In addition, we have MTU approval as well as Rolls-Royce approval according to RRP58001 for the ultrasonic testing of turbine disks.

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Reliable. Fast. Precise.

We offer you all methods of non-destructive material testing in service

Our comprehensive service portfolio in nondestructive materials testing enables us to use the most suitable test method and solution for your inspection tasks. We provide non-destructive single and serial testing of your components as a service in our test center or at your site. On this page you will find an overview of our applied non-destructive testing methods.

 
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Eddy Current Testing (ET)

Eddy current testing is used to detect surface defects and near-surface defects in electrically conductive metals. For this purpose, electromagnetic currents are generated in the component. Since these currents swirl in a circle, the method is called eddy current testing. Defects in the material change the course of these eddy current lines, whereby defects are detected.
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Ultrasonic testing (UT)

Ultrasound is the method of choice when it comes to 100% inspection for internal material defects, surface cracks and wall thickness measurement. Ultrasonic testing is based on the amplitude and time-of-flight measurement of sound waves. These are emitted by an ultrasonic probe and their reflections are received back. Defects in the material cause a change in the sound waves, allowing them to be detected and located by the inspector. Transit times determine the location of the defect, amplitudes the backscatter magnitude and thus a measure of the size of the defect. Requirement: Your material is sound-conductive, e.g. metals and plastics.
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Dye penetrant testing (PT)

Dye penetrant testing is used to detect material defects open towards the surface in almost all materials. For this purpose, a penetrant is applied to the cleaned component surface. After a penetration time and subsequent intermediate cleaning, a developer is then applied. This draws the color still contained in the defects, such as cracks and pores, out again, making them visible.
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Dye penetrant testing (PT)

Dye penetrant testing is used to detect material defects open towards the surface in almost all materials. For this purpose, a penetrant is applied to the cleaned component surface. After a penetration time and subsequent intermediate cleaning, a developer is then applied. This draws the color still contained in the defects, such as cracks and pores, out again, making them visible.
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Visual testing (VT)

During visual inspection, the surface of the component is visually inspected with regard to its inspection characteristics such as shape and geometry. The inspection can be performed with or without aids (e.g. magnifying glass, mirror or video endoscope).
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Magnetic particle testing (MT)

Magnetic particle inspection is used to detect surface defects and near-surface defects in ferromagnetic metals. This inspection method makes use of the laws of magnetization. Defects in the material cause changes in the magnetic flux and these are made visible by iron powder with contrasting color or fluorescent magnetic powder.
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Digital radiology (RT)

Particularly components with complex geometry are inspected for internal material defects using X-rays or gamma rays. With the aid of a radiator, the density of the component is imaged on a digital detector. Based on the different blackenings of the generated projection image of the component, defects and material differences can be detected. We offer this testing technique in cooperation with our partner.
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Visual testing (VT)

During visual inspection, the surface of the component is visually inspected with regard to its inspection characteristics such as shape and geometry. The inspection can be performed with or without aids (e.g. magnifying glass, mirror or video endoscope).

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comprehensive analysis

non-destructive material testing (NDT)

Non-destructive materials testing supports you in your quality assurance, product development, process optimization and damage analyses. Among other things, the quality of spot welds and weld seams as well as the material properties of input materials and components are tested, e.g. tubes, rods, bars, rings, sheets, plates, shafts,  bolts, rollers, gears, bars, brake cylinders, gear wheels, differentials, engine blocks, turbine disks, bearing rings, pressure vessels, bridge girders, pressure cylinders, drums, rims, valves, rotors, laminated beams, bonded joints, soldered joints, welds (laser welds, electron beam welds, butt welds, fillet welds, U, Y and V welds, step welds, spot welds, circumferential welds, longitudinal welds) on various components, flanges, carbon fiber plates, CFRP components, pipes, pipelines, tanks and railroad wheelsets.
Here, the inspection is carried out individually, in series, during production and, in the case of components in operation, also on a recurring basis.

Our range of nondestructive testing services includes ultrasonic testing (UT), magnetic particle testing (MT), dye penetrant testing (PT), eddy current testing (ET), visual testing (VT) and radiographic testing (DS, RT).

What is a nondestructive materials inspection?

Non-destructive testing (NDT) is a collective term for various testing methods used to check the quality of a component or material in a non-destructive manner. It is used to examine materials and components without altering their shape, structure or safety. As a result, they can subsequently be further processed or used.

Testing is performed for external and internal quality such as homogeneity, degree of purity, wall thicknesses and adhesion properties. Depending on the testing method used, micrometers of defects can be detected.

Non-destructive testing is used in particular for safety-relevant components or assemblies from the automotive, metalworking, shipbuilding and aerospace industries. Non-destructive testing methods are standardized and carried out in accordance with DIN EN ISO standards and the US American ASME regulations as well as individual customer instructions.

Advantages of NDT (nondestructive testing) compared to destructive tests

In destructive testing, the materials and components used to determine quality are, as the name suggests, damaged and rendered unusable for their intended use. This type of testing provides the designer with material parameters such as quality, suitability for the intended use, or stability of joints. These destructive testing methods include tensile strength testing, hardness measurement and metallographic evaluations. In prototyping and production start-ups, destructive testing is also used, among other things, to correlate with the test results of nondestructive testing.

The greatest advantage of non-destructive testing is the conservation of resources. Since the tested component remains intact, it does not have to be remanufactured afterwards. This results in financial, time and personnel savings. If desired, a 100% inspection of all manufactured components can also be carried out. On the one hand, quality deviations in series production can be quickly detected and eliminated. And on the other hand, it ensures that all produced components are free of defects in a standardized manner, thus preventing failure-related accidents, environmental damage, property damage and cost-intensive recall campaigns.

Often, non-destructive material testing also supports the monitoring of production through trend analyses of the comparisons of the results of non-destructive tests. This additionally leads to preventive avoidance of defective prefabricated parts by early intervention when detecting frequent occurrences of inferior but still acceptable quality.

Test service provider from Burgwedel

Nondestructive materials testing with VOGT Ultrasonics

Since 1983, our non-destructive testing solutions have already made us a partner to well-known medium-sized companies and major concerns in the automotive, aerospace, energy, metalworking and shipbuilding sectors. 

We are accredited as an independent testing laboratory according to DIN EN ISO/IEC 17025, certified according to ISO 9001 for industry and EN 9100 for aviation, and MTU and Rolls-Royce approved. We fulfill your testing requirements according to DIN standards, ASME or customer-specific regulations. Our testing personnel are highly trained and certified according to internationally recognized certification programs such as the DGZfP course system. We implement your testing solution quickly, safely and reliably.

In addition to our range of services, we also produce high-performance ultrasonic testing systems for our customers for series-accompanying testing in the sense of Industry 4.0. Thus, we have a wide range of experience to realize the ideal testing method for your testing task.

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Automated ultrasonic testing in the VOGT test center

In 3-shift operation, we perform long-term as well as short-term assignments in non-destructive materials testing in our testing center, quickly and safely. Here we have specialized in particular in mechanized ultrasonic testing. By automating scanning processes, it is possible to test complex, rotationally symmetrical or flat components as well as other shapes reproducibly and reliably with the ultrasonic testing systems.

Once set up, the ultrasonic setting parameters, as well as the scan and probe positions, are stored by the computer integrated in the inspection system and can be retrieved for recurring inspections. This eliminates the need for time-consuming re-setting of the inspection system. Testing series parts in time-delayed batches is thus possible without problems, quickly and cost-effectively.

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Advantages of NDT

Quality assurance by means of non-destructive material testing

The primary goal of non-destructive materials testing is damage prevention to protect people, objects and the environment. This is done by making visible quality defects in components and constructions that negatively affect their usability. For this purpose, different non-destructive reproducible and repeatable testing methods are used, depending on the testing task.

NDT has become an indispensable part of production technology in almost every industry. It also plays a major role in the context of product liability. According to the Liability Act, the producer is responsible for proving that a defect that was inherent in the product at the time of the damaging event was not yet present at the time the product was placed on the market. Thus, case law sets the requirements for knowledge of the state of the art and science very high. Proof of freedom from defects can only be provided by non-destructive testing and inspection of the promised product characteristics. Thus, the required product control must be introduced and documented and the appropriate qualified personnel for this must be available or provided by an external service provider such as VOGT Ultrasonics GmbH. In case of using a service provider accredited as a testing laboratory for the monitoring of the product quality, the due diligence is considered and the service provider is taken into the obligation.

The quality assurance measure also includes the quality management manual with the procedural instructions and work instructions as well as the consideration of relevant DIN EN standards or other specifications defined by committees (e.g. DGZfP or also DVS guidelines), which specify the necessary test procedures according to the state of the art on specific components in the test instructions. The basis of quality standards is a seamless quality assurance system – from incoming goods through production to final acceptance and outgoing goods.

An external service provider can be assessed here, for example, on the basis of an accreditation. If the testing laboratory has an accreditation according to DIN EN ISO/IEC 17025 and at the same time a certification of its quality system (e.g. ISO EN 9001 or 9100), essential conditions for the qualitative planning and execution of work in quality assurance are set on a good basis.

100% inspection quota through ultrasonic systems

Ultrasonic testing is a proven method of non-destructive materials testing, which has become increasingly relevant in recent years thanks to innovative testing systems and evaluation algorithms. For example, it is used in aviation and in body-in-white construction for safety-relevant components as a 100% inspection during production.

Ultrasonic testing can be performed manually, automatically or fully automated with the aid of testing robots or handling machines Depending on the testing system used, the inspector is supported by an automated evaluation proposal. This saves time and creates testing reliability.

Time advantage

Non-destructive materials testing can be very time-consuming, especially when the smallest defects are to be detected in large components. For this reason, the right choice of non-destructive testing method must be made as part of the time optimization for these inspections of components, which then often also represents the best compromise between defect detection size and reliability as well as inspection duration and effort. Many non-destructive testing methods can be fully automated, especially ultrasonic and eddy current testing, which can significantly reduce testing time and effort.

Material advantage

In its variety of applications and test methods, non-destructive materials testing covers a wide range of materials and components in terms of testability. Thus, for each material and for each component form, the appropriate test method can be selected to prove the integrity.

Cost advantage

If non-destructive testing is used during production, defects in the production process can be detected and eliminated at an early stage. This results in an optimization of the entire production process. The consistent quality level generated increases customer satisfaction and at the same time leads to cost savings through the reduction of rejects. Also, large parts of destructive testing can already be replaced by it, which also saves resources.

Personnel advantage

Non-destructive testing methods today can be partially automated and fully automated. Thus, inspection personnel are supported with state-of-the-art technology such as automatic, complete documentation, an inspection robot or an automated evaluation proposal for efficient work.

 
 
if there are still questions

FAQ

Non-destructive testing (NDT) is used in the quality assurance of manufactured and in-service components and assemblies such as differentials, gears, tubes, rods, engines, chassis parts, bearings, pipelines and pressure vessels. Various test methods are used to non-destructively inspect them for freedom from defects according to previously defined criteria.
Non-destructive testing (NDT) is used in the quality assurance of manufactured and in-service components and assemblies such as differentials, gears, tubes, rods, engines, chassis parts, bearings, pipelines and pressure vessels. Various test methods are used to non-destructively inspect them for freedom from defects according to previously defined criteria.
The main non-destructive testing methods include Ultrasonic Testing (UT), Dye Penetrant Testing (PT), Eddy Current Testing (ET), Magnetic Particle Testing (MT), Digital Radiology (DR + RT) and Visual Testing (VT).

Compared to destructive testing, non-destructive testing methods have the advantage that the tested material or component remains unchanged. The test therefore does not produce any rejects, which results in a saving of resources. In addition, it enables 100% testing of all components that are placed on the market.

Non-destructive materials testing is suitable for components and materials whose further usability is not to be impaired by the test. Among other things, the quality of joints and the volume are tested for material defects or wall thickness variations as well as starting materials for material properties, e.g. the determination of the degree of purity on rods for roller, tapered and ball bearings.
We stand for quality
Certifications & Accreditations

Certified quality management for the industry



Certified quality management for the aviation industry



for the inspection of turbine disks (MTU)



for the ultrasonic testing of turbine disks in our testing center in Burgwedel (Hanover, Germany)

 

We are an accredited testing laboratory




for systematic and effective work safety




We can provide you with qualified testing personnel within the framework of temporary employment.



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