Analysis of thermo-elastic and physical properties of recycled 2017 Aluminium Alloy/Gp composites: thermal management application

Abstract

This paper investigates the use of graphite in 2017 Aluminium matrix composite for thermal management systems by analyzing their thermo-elastic behavior. The composite samples were prepared with different graphite contents using powder metallurgy method based on recycled 2017 Aluminium alloy powder. The distribution of graphite particles in the 2017 Aluminium alloy matrix was investigated by a scanning electron microscope (SEM). Sintered densities of the composite samples were examined by a gravimetric method and it is noticed that in the fact of increasing the graphite content decreases the densification of composites which is confirmed by SEM analysis. Thereafter, the obtained samples were analyzed by dilatometry through measuring the coefficient of thermal expansion (CTE), which showed a decrease with the addition of graphite.

Determination of linear expansion of AlSi10Mg aluminium alloy depending on external conditions during solidification

“…The influence of microstructure is also evident on the thermal dilatation of castings, and therefore, instead of the conventional method of monitoring solidification curves (TA), when cooling the casting, the thermal dilatation can be monitored and evaluated on already solidified samples [ 1 ]. The monitoring of thermal expansion or TA is dealt with by the authors in the articles [ 36 , 37 , 38 ]. They monitor here the influence of alloying elements (Si, Cu, Ni), coefficient of thermal expansion and also the resistance to thermal shocks.…”

Evaluation of the Effect of External Conditions During Crystallization and Solidification on the Final Structure of AlSi7Mg

“…By influencing the solidification process of the metal, microstructural changes in the material can also be achieved, e.g. high cooling rates enable the refinement of the eutectic silicon phase, which significantly influences the mechanical properties of the material, especially its brittleness [7][8].…”