DEVICE AND METHOD FOR MATERIAL TESTING IN APPLICATION-RELATED CONDITIONS
Detailed knowledge of the materials, which are developed for a specific field of application,
represents an essential basis for product engineering. In order to decrease the development
time and cost increasingly large portions of product development are carried out virtually.
Thus, exact knowledge of the material properties becomes absolutely crucial. For example,
special high-temperature materials developed for their use in internal combustion engines require
material testing under conditions that replicate this demanding environment. However,
typical material tests are carried out in ambient air. Although, the composition of the laboratory
air differs significantly from the service conditions in real operation, which can drastically
affect the damage behavior of the material.
The inventors have developed a novel device and method, which enables the generation of
an experimental atmosphere closely representing the real application conditions by adding
water, harmful substances and particles to a precisely controlled composition of gases. The invention
allows for detailed material testing to be carried out in these well-defined conditions.
During the tests, both the composition and the volume flow rate of the media can be varied.
Making it, for example, possible to simulate the exhaust gas from different load conditions of
an internal combustion engine. The inventions enable quasistatic experiments, such as tensile
or creep tests, and cyclic experiments, such as thermomechanical fatigue. The test region of
the sample is uniformly surrounded by a precisely controlled atmosphere, which also enables
high and realistic cooling rates. In summary, the inventions enable development of materials
that are excellently suited for their application and improved life-cycle assessment.
Figure: Illustration demonstrating the variability of device and method. (Left) Precisely controlled time varying
atmospheric conditions. (Middle) The material under testing and a time varying applied force. Several probes
performing local measurements of strain and temperature. (Right) Measurement results predict the exact material
properties under application-relevant conditions.
Application specific material testing for streamlined product development. Specifically, the determination
of material properties under precisely controlled environmental conditions. Some
of the relevant industries include Automotive, Aerospace, Chemical, and Energy.
Thoroughly tested prototype.