Elastic Constants by Resonant Ultrasound Spectroscopy – Application to Thermoelectrics and Aluminum Alloys


  • Benedikt Klobes University of Applied Sciences, Bremerhaven, Laboratory of Nanotechnology, An der Karlstadt 8, 27568 Bremerhaven, Germany




resonant ultrasound spectroscopy, elastic constants, thermoelectric materials, age hardening, aluminum alloys


Resonant ultrasound spectroscopy is a non-destructive technique for determining the elastic constants of a material. In the context of thermoelectric materials, elastic constants can be used to investigate the speed of sound and, thus, the lattice thermal conductivity of a substance. For Mg2Si-Mg2Sn solid solutions, a possible connection between shear modulus and band convergence can be assumed in that way. Moreover, the rather low speed of sound in this system points towards a high contribution of optical phonons to thermal conductivity. Additionally, significant resonance frequency shifts are observed during natural aging of technical Al-Cu-Mg and Al-Mg-Si alloys, which are proposed to assist investigation of the early stages of clustering in the future.


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How to Cite

Klobes, B. (2019). Elastic Constants by Resonant Ultrasound Spectroscopy – Application to Thermoelectrics and Aluminum Alloys. Scientific Journal of Gdynia Maritime University, 1(112), 60–68. https://doi.org/10.26408/112.05