Non-destructive measurements of sample resonant frequencies to allow for the determination of Youngs Modulus. Furnace allows testing at temperature up to 1500C.
Overview
Impulse Excitation Technique, IET, is a non-destructive material characterization technique. It can determine the elastic properties, such as Youngs Modulus or shear Modulus.
Samples can be of any regular prism geometry. Suspended or held at a specific point in relation to length, the sample can be excited mechanically by lightly striking it with a ‘hammer’. This induces a vibration into the sample, known as the natural frequency. A contact sensor or a microphone picks up the frequency of this vibration. From this, and the materials dimensions, the various modes of vibration can be analysed.
Applications
- testing of metals, ceramics, and composites
- elastic and shear modulus determination
- Poisson’s Ratio
- damping / internal friction characterisation that may arise from changes in internal microstructure and defects.
Technical specifications
- frequency range 20 Hz – 100 kHz
- reference accuracy better than 0.005%
- resolution up to 1/1.000.000
- furnace maximum temperature 1,500 °C
Materials Research Facility
Available for users working in fusion, fission and other research programmes. We have scientific and operational teams to support experiments and sample preparation.