Currently there is a constant development in the field of aluminium alloys engineering. This results from, i.a., better understanding of the
mechanisms that direct strengthening of these alloys and the role of microalloying. Now it is microalloying in aluminum alloys that is
receiving a lot of attention. It affects substantially the macro- and microstructure and kinetics of phase transformation influencing the
properties during production and its exploitation. 7xxx series aluminum alloys, based on the Al-Zn-Mg-Cu system, are high-strength
alloys, moreover, the presence of Zr and Sr further increases their strength and improves resistance to cracking.
This study aims to present the changes of the properties, depending on the alloy chemical composition and the macro- and microstructure.
Therefore, the characteristics in the field of hardness, tensile strength, yield strength and elongation are shown on selected examples.
Observations were made on ingot samples obtained by semi-continuous casting, in the homogenized state.
Samples were prepared from aluminum alloys in accordance with PN-EN 573-3: 2013. The advantage of Al-Zn-Mg-Cu alloys are
undoubtedly good strength, Light-weight and resistance to corrosion. As widening of the already published studies it is sought to
demonstrate the repeatability of the physical parameters in the whole volume of the sample.
The work presents experiment results from the area of copper casting technology and chosen examples of alloyed copper. At present,
copper casting technology is applied in many branches of industrial manufacturing, especially in the sector of construction,
communications, arms and power engineering. Alloyed copper, containing slight additions of different elements and having special
physio-chemical properties, is used in a special range of applications. Copper technology and alloyed copper analyses have been presented,
these materials being used for cast manufacturing for power engineering. The quality of casts has been assessed, based on their
microstructure analysis, chemical content and the cast properties. During the research, special deoxidizing and modifying agents were
applied for copper and chosen examples of alloyed copper; also exemplary samples were tested with the help of metallographic analysis,
electrical conductivity and gaseous impurities research.