DRUŠTVO LIVARJEV SLOVENIJESLOVENIAN FOUNDRYMEN SOCIETY
Član The World Foundry OrganizationMember of World Foundry Organization

Precipitation-hardenable aluminium alloys are often expected to have specific hardness and strength, so we often use specific operations. One essential attribute of a precipitation hardening alloy system is a temperature dependent equilibrium solid solubility, characterized by increasing solubility with increasing temperature. One case of an aluminium alloy systems with precipitation hardening is the AlCu3 alloy. The alloy was examined with the triple simple thermal analysis (TETA), the simultaneous thermal analysis (STA), the computer simulation using the Thermo-Calc program and electronic microanalysis (SEM). We determined the energy of the primary and the eutectic phase at solidification and melting and the precipitation energy of the precipitates Al2Cu and some other precipitates that were clearly seen in the curves of simultaneous thermal analyses.
Keywords: Al-Cu alloys, thermodynamic, precipitation hardenable, energy of the precipitation, precipitations, ...

Industrial computed tomography is a useful method for measuring tasks and identification of defects in castings. The demand for CT services for application in light-metal casting has been growing strongly in recent years. Automotive manufacturers and large foundries have purchased or are going to purchase their own systems. SMEs must rely on service providers because CT scanners are quite expensive to buy and maintain. Hopefully, a new generation of CT systems will make it possible in the near future to complete the measuring operations on larger parts with the same accuracy in less time, which would reduce the cost of data acquisition. This will probably pave the way to a wider application of this method.

Al-Mg alloys contain up to 10,5 mass % Mg. We can divide them on those where magnesium is the main alloying element and on those where magnesium is accompanying alloying element. The rest alloying elements that appear in these alloys are: manganese, iron, copper, silicon,... The aim of this article is to present a few results of thermodynamic and thermal analysis of wrought aluminium alloys, especially of those with magnesium. The article contain the results of thermodynamic and thermal analysis of following alloys: electrolytic aluminium, AlMn1, AlMn0,5Mg0,5, AlCu4Mg, AlMg3 and AlMg9.