In various industries such as automotive industry, aircraft or steel construction failures in the final product can quickly lead to malfunction and, as a result, can massively compromise the operational reliability. Thus, nondestructive testing methods will play a key role in the quality assurance because they allow to inspect components and parts without destroying them.
From 10 to 12 March 2015, at the JEC Europe in Paris, engineers of Fraunhofer IZFP in Saarbrücken will introduce a novel procedure which enables noncontact and contamination-free defect inspection even in case of strongly absorbing hybrid materials (hall 7.2, booth F35).
They are not ascertainable by the naked eye – nevertheless minute cracks or defects, particularly in safety-critical sectors, can cause disastrous consequences. Notwithstanding this the requests for weight reduction without materials impairment steadily increase.
In order to meet such requirement profiles, the use of new materials – such as carbon or glass fiber-reinforced plastics (CFRP, GFRP), high-strength steels and light metals, often also in combination for hybrids applications – is indispensable.
Researchers at Fraunhofer Institute for Nondestructive Testing IZFP in Saarbrücken succeeded in enhancing the use of air-coupled ultrasound as a nondestructive inspection method for noncontact and contamination-free materials inspection. “The probes we developed at our institute to examine thin materials allow higher frequency compared to competing products. Due to this improvement a highly sensitive and optimized defect detection capability is achieved," Dr. Thomas Waschkies, responsible engineer at Fraunhofer IZFP, explains.
"The improved probe design with its higher noise allows the contamination-free examination even of strongly absorbing hybrid materials." In particular the lower inspection frequencies are important for the examination of these materials – which in general can´t be examined in immersion technique - since at lower frequencies the attenuation of sound in the material is much lower than in case of conventional testing.
Each inspection application comes with its specific requirements concerning accessibility, defect resolution, robustness against environmental influences and special probe type. That’s why Fraunhofer IZFP’s air-coupled ultrasound transducers are custom-made for a particular application.
"The air-coupled ultrasound inspection is particularly suitable for the examination of thin plates with thicknesses of some few centimeters. However, in principle all materials currently used in modern structural components, e. g., in automotive industry or aircraft, can be examined," Waschkies says. Often, these so-called ‘new materials’, such as CFRP, GFRP, high strength steels and light metals, are combined and processed to hybrid components or parts.
At this year's JEC Europe in Paris, beside of demonstrating and explaining the principle functionality of this inspection method, Fraunhofer IZFP will give indications for applications in many industrial sectors.
Sabine Poitevin-Burbes | Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP
Innovative Infrared heat reduces energy consumption in coating packaging for food
12.12.2018 | Heraeus Noblelight GmbH
Mobile learning, artificial intelligence and digital training formats in science and research
04.12.2018 | time4you GmbH
What if, instead of turning up the thermostat, you could warm up with high-tech, flexible patches sewn into your clothes - while significantly reducing your...
A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.
The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...
A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.
Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...
Over the last decade, there has been much excitement about the discovery, recognised by the Nobel Prize in Physics only two years ago, that there are two types...
What if a sensor sensing a thing could be part of the thing itself? Rice University engineers believe they have a two-dimensional solution to do just that.
Rice engineers led by materials scientists Pulickel Ajayan and Jun Lou have developed a method to make atom-flat sensors that seamlessly integrate with devices...
12.12.2018 | Event News
10.12.2018 | Event News
06.12.2018 | Event News
14.12.2018 | Ecology, The Environment and Conservation
13.12.2018 | Life Sciences
13.12.2018 | Physics and Astronomy