Institute of Materials Research

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Werkstoffprüfung

Screw driven and servo-hydraulic testing machines

with maximum loads from 10 kN to 1000 kN. For these machines furnaces for temperatures up to 1400°C, low-temperature equipment down to -196°C, chambers for corrosion investigations and vacuum chambers are available.

Biaxial testing equipment

for flat test pieces from 100 mm * 100 mm up to 1000 mm * 1500 mm. With the four servo-hydraulic pistons tests with dynamic loads up to 1000 kN can be performed. The maximum testing frequency amounts to 20 Hz.

Ultrasonic test equipment for work pieces up to 400 mm x 1000 mm

The ultrasonic testing of FSW butt joints and T-joints is accomplished with high frequency ultrasonic equipment. Water is used as coupling medium. The system permits fast measurements of A -, B -, C and D-pictures in high resolution (up to 30000 measurements per second, specially designed ultrasonic probes).

Laser extensometer for locally dissolved strain measurement

The extensometer is used mainly for tensile tests of welded samples. The mechanical properties of the different welding seam zones can be determined and be correlated to local hardness values and microstructural characteristics. The total measuring length amounts to 80 mm.

Push out testing

Push out device for the determination of the shear stress of the fibre matrix interface of fibre reinforced materials. By this method important characteristic values for the material behaviour and the simulation of the material behaviour can be measured.

Life span regulation with thermal change

For testing of thermal barrier coatings and oxidation protection coatings several computer controlled thermo cyclic rigs are available with testing temperatures up to 1200°C and rapid cooling down to room temperature. Samples or parts are moved into the hot furnace, held at temperature for a pre-defined time, and than cooled down rapidly in moving air to RT. Typical lifetimes for 1h cycles at 1100°C (50 min heating/10min cooling) are between 500 and 5000h.

MIRO

Micro-rotation device for determination of lifetime of fibres, wires and monofilaments using the principle of rotating bending. Minimum bending radius app. 3 mm, frequency 0-1000 Hz

Test facilities for multiaxial thermomechanical testing

Multiaxial stresses are generated in cooled components by thermal gradients. In case of internal cooling, for example of blades in the first stage of a jet engine, the thermally induced stresses cannot relax by means of macroscopic deformations. The constraints of the component result in multiaxial compressive stresses at the heated surface and multiaxial tensile stresses at the cooled surface. It is not possible to simulate these stress states in conventional thermomechanical testing with a homogenous temperature distribution.

High temperature water vapour corrosion testing facility

Test stand for ceramic materials for measurements of their corrosion behaviour in atmospheres with up to 100 % H2 O-steam, flow rates up to 10 m/s and temperatures up to 1500 °C.

Sensor und Catalyst Characterization Center (SESAM)

The sensor und catalyst characterization center which is specially constructed for testing of these materials has a gas mixing unit through which up to eight individual gases can be mixed and sent into a quartz glass reactor to heat to temperatures up to 1200°C before entering into the test chamber.