The DGM and the Alfried Krupp-Schülerlabor of the Ruhr-University Bochum want to bring the field of Materials science and engineering closer to children still at school - more importantly because, despite its economic and social importance, materials science and engineering is not a school subject. In the Alfried Krupp school laboratory, the movable exhibition "Research Expedition into the Land of Materials Science and Engineering" which was conceived by the DGM and funded by the BMBF can be found.
The travelling exhibition can be rented, for example for an Open Day (transport costs and maintenance flat charge). Each year, the Alfried Krupp-Schülerlabor is visited by more than 7,000 schoolchildren.
The basis for the occurence of shape memory effects are transformations in the grid pattern of the metal structure. At normal temperature, the metal structure exists in the so-called martensite structure. At a higher temperature, a phase transformation takes place into the austenitic structure. This type of phase transformation can be found in different metals and metal alloys.
Hardness is the resistance that a solid object has against the penetration of another harder material. Every material has its own hardness! The determination of the hardness is very important for the material's use. If the material is not hard enough it can break!
Magnetic fluids are suspensions with magnetic nano-particles in suitable carrier liquids - so-called magnetofluids. Through magnetic fields, the properties of the liquid can be changed and therefore fulfill certain functions. The most common use of magnetofluid at this time is as a seal. With permanent magnets, the magnetofluid is held at the point of sealing and can even withstand strong pressure. Such seals can be attached, for example to fast-turning disk drives, to protect the data storage medium against dust. Because of their high reliability, these seals can also be used in space travel.
How does one examine a surface? In classical light microscopy, the light reflected by or transmitted through the object being examined, is passed through a series of lenses so that it can be recorded by the eye or a camera. The development of microscopy revolutionised materials science and engineering and remains a very important tool.
Spectroscopy is not just one of the most important methods of examination in instrumental analysis, but it is also characterised by its high aesthetic appeal. In addition, it offers the possibility of identifying materials by means of their spectrum. In this way, what reflected light from materials reveals about their composition can be examined!
Non-destructive testing is significantly, jointly responsible for accidents and catastrophes that don't happen. That is possibly the reason why, despite the fact that it is hugely important for our daily lives, so few people are aware of it. In non-destructive testing, the quality of a workpiece is tested, without damaging the material itself.
Thermography uses infrared rays, which are emitted from hot surfaces, to measure temperature. Always when a surface becomes hotter, it begins to emit more rays at far-infrared wavelengths.
In the tensile test, samples with a small cross-sectional area are stretched until breaking point, whereby the expansion is even, shock-free and carried out at a slow speed. If the material is not strong enough, it will probably break!