Amplitude Dependent Damping of Aluminum-Matrix-Nanoparticle-Composites

Abstract:

Aluminum-matrix-nanoparticle-composites were produced by ball milling of micro scale aluminum powder in air atmosphere with subsequent consolidation by hot extrusion and also additional hot swaging. They were investigated in this condition after step by step isochronal annealing with successive increasing annealing temperature and quenching into water to room temperature. The material was investigated by amplitude dependent damping, hardness and density measurements, all at room temperature. For all measured amplitude dependent internal friction (ADIF) curves the damping increases with increasing strain amplitude. After some annealing treatments a knee occurs in the medium strain amplitude region of these curves. Moreover between annealing temperatures from 360°C to 480°C the strain dependent damping becomes a maximum, i.e. a peak in the ADIF curves occurs. Other ADIF curves of quenched and fatigued material show characteristic peaks that can be attributed to individual single cracks. It is shown that all these effects are due to the formation, opening and compression of cracks present in the sample or created by thermally exerted stresses.

• Periodical: Solid State Phenomena (Volume 184)
• Pages: 307-312
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.184.307
• Online since: January 2012
• Authors: A. Kazakewitsch, Werner Riehemann
• Keywords: ADIF, Aluminum Powder, Ball Milling, Consolidation, Crack, Damping, Fatigue, Hot Extrusion, Hot Swaging, Metal Matrix Composite (MMC), MMC, Thermal Cracks

References

[1] C. Suryanarayana, Mechanical alloying and milling, Progress in Materials Science 46 (2001) 24.

[2] W. Schatt, K. P. Wieters, B. Kieback, Pulvermetallurgie. Technologien und Werkstoffe, (2007) 141-143.

[3] J. Göken und W. Riehemann, Dehnungsabhängige Dämpfungsmessungen an abklingenden Biegeschwingungen von Werkstoffen, tm 12 (2001) 535 – 545.

DOI: 10.1524/teme.2001.68.12.535

[4] J. Göken und W. Riehemann, Thermoelastic Damping oft he Low density Metals AZ91 and DISPAL, Mat. Sci. Eng. A324 (2002) 134-140.

DOI: 10.1016/s0921-5093(01)01295-3

[5] A.V. Granato, K. Lücke, J. Appl. Phys. 27 (1956) 583.

[6] A.V. Granato, K. Lücke, J. Appl. Phys. 27 (1956) 789.

[7] M.S. Blanter, I. S. Golovin, H. Neuhäuser, H. R. Sinning, Internal Friction in Metallic Materials, Springer-Verlag, Berlin, (2007).

DOI: 10.1007/978-3-540-68758-0

[8] J. Göken, W. Riehemann, Damping behaviour of AZ91 magnesium alloy with cracks, Mat. Sci. Eng., A370/1-2, (2004) 417-421.

DOI: 10.1016/j.msea.2003.08.110