Mechanical Properties of Aluminum-Matrix-Nanoparticle-Composites


Article Preview

Aluminium-Matrix-Nanoparticle-Composites were produced by ball milling of micro scale Aluminium powder with various nanoscales ceramic powders like Silicon Carbide, Alumina and Boron Nitride with subsequent consolidation by hot extruding. The composites were investigated by amplitude dependent damping tests, tensile tests at elevated temperatures, hardness measurements, imaging methods and electric conductivity tests. All tested samples were machined out of hot extruded rods. The Amplitude dependent damping of bending samples was determined by measuring the strain dependent logarithmic decrement of free decaying vibrations of bending beams at room temperature. These tests were done after successive step by step isochronal heat treatments. Some samples show substantial improvement of the mechanical properties due to dispersion hardening or grain refinement. It can be concluded that the results are mainly influenced by dislocation effects like Orowan-effect, work-hardening, grain-size-hardening, recrystallization, and creation of dislocations at ceramic particles due to thermal mismatch. Moreover some results can be attributed to fatigue during mechanical cycling namely crack nucleation, crack growth and fraction. The electric conductivity was measured indirectly by permeability tests with a digital hysteresis recording devise. The results show the low influence of nano-particle dispersion hardening to conductivity in comparison of work-hardening.



Edited by:

Prof. Axel S. Herrmann




A. Kasakewitsch et al., "Mechanical Properties of Aluminum-Matrix-Nanoparticle-Composites", Key Engineering Materials, Vol. 742, pp. 145-150, 2017

Online since:

July 2017




* - Corresponding Author

[1] E. Nembach, Particle Strengthening of Metals and Alloys, John Wiley Sons, (1997).

[2] A. Kazakewitsch, W. Riehemann, Amplitude Dependent Damping of Aluminum-Matrix-Nanoparticle-Composites, Solid State Phenomena 184 (2012) 307-312.


[3] W. Riehemann, A. Kazakewitsch, Mechanical Properties of Aluminum Strengthened with Nano- scale Ceramic Particles, PM 2012, Yokahama.

[4] J. Görken, W. Riehemann, Mater. Sci. Eng. A324 (2002) 134-140.

[5] D. Ramin, W. Riehemann, Automatic Measurement of the Magnetic Properties of Extreme Soft Magnetic Ferromagnetic Materials, Technisches Messen 68 (2001) 116-125.


[6] R.M. Bozorth Ferromagnetism, D. Van Nostrand Company, Inc. (1951) 778-779.

[7] B. Weidenfeller, Magnetic Properties of Polymer Bonded Soft Magnetic Composites, Papierflieger Verlag (2008), Clausthal-Zellerfeld, ISBN: 978-3-89720-943-4.

[8] A. Kazakewitsch, Herstellung und mechanische Eigenschaften von Aluminium-Matrix-Kompositen dispersionsverstärkt mit nanoskaligen Keramikartikeln, Papierflieger Verlag (2013), Clausthal-Zellerfeld, ISBN: 978-3-943917-62-8.

[9] J.I. Pérez-Landazábal, O.A. Lambri, F.G. Bonifacich, V. Sánchez-Alarcos, V. Recarte, F. Tarditti, Influence of defects on the irreversible phase transition in Fe–Pd ferromagnetic shape memory alloys, Acta Mater. 86 (2015) 110-117.


[10] F.G. Bonifacich, O.A. Lambri, J.I. Pérez-Landazábal, D. Gargicevich, V. Recarte, V. Sánchez-Alarcos, Mobility of twin boundaries in Fe-Pd ferromagnetic shape memory alloys, Mater. Trans. JIM. To appear in Vol. 57 (2016) 1837-1844.