Evaluation of the Effect of Selected Alloying Elements on the Mechanical and Electrical Aluminium Properties

Abstract

Modern industry expects aluminum products with new, unusual, and well-defined functional properties. Last years we are able to notice constant development of aluminium alloys. In food industry, power engineering, electrical engineering and building engineering, flat rolled products of 1XXX series aluminium alloys are used.8XXX series alloys registered in Aluminium Association during last 20 years may be used as an alternative. These alloys have very good thermal and electrical conductivity and perfect technological formability. Moreover, these materials are able to obtain by aluminium scrap recycling. Fundamental alloy additives of 8XXX series are Fe, Si, Mn, Mg, Cu and Zn. Aluminium alloying with these additives makes it possible to obtain materials with different mechanical ale electrical properties. In this paper, the analysis of alloy elements content (in 8XXX series) effect on chosen properties of material in as cast and after thermal treatment tempers has been presented.Keywords: aluminium 8XXX, electrical conductivity, hardness, homogenization Współczesna gospodarka oczekuje wyrobów aluminiowych o nowych, lepszych i ściśle określonych właściwościach użyt-kowych. W ostatnich latach obserwowany jest ciągły rozwój stopów aluminium. W przemyśle spożywczym, energetyce, elektrotechnice i w budownictwie tradycyjnie stosuje sie płaskie wyroby walcowane ze stopów aluminium serii 1XXX. Alternatywą są zarejestrowane w ostatnim dwudziestoleciu w Aluminum Association stopy serii 8XXX. Stopy te mają dobrą przewodność cieplną i elektryczną oraz znakomitą podatność do odkształcenia plastycznego. Ponadto materiały te można otrzymywać na drodze recyklingu złomu aluminiowego. Podstawowymi dodatkami stopowymi serii 8XXX są Fe, Si, Mn, Mg, Cu i Zn. Stopowanie aluminium tymi dodatkami pozwala uzyskać materiały o zróżnicowanych własnościach mechanicznych i elektrycznych. W pracy przedstawiono analizę wpływu zawartości pierwiastków stopowych obecnych w serii 8XXX na wybrane własności materiału w stanach po odlewaniu oraz po obróbce cieplnej.

Effect of Fe-rich particles and solutes on the creep behaviour of 8xxx alloys

“…On the other hand, the Fe solute level after the thermal holding treatment was evaluated by EC measurements. Based on the relationship between the EC and concentration of the alloying elements in the solid solution, a quantitative estimation of the Fe solute content was calculated according to the following equation: 29,30 …”

Influence of the Chemical Composition on Electrical Conductivity and Mechanical Properties of the Hypoeutectic Al-Si-Mg Alloys

“…as well as presence of obstacles such as other phase's particles, porosity, grain boundaries etc. Mamala et al [10] have found that iron strongly affects the conductivity of the α-Al solid solution, however it is not so harmful when bounded outside the solid solution. This conclusion is in accordance with our investigations, in which iron is present mainly in form of intermetallic phases and is not determining for the electrical properties.…”

Microstructure and Mechanical Properties of Aluminum Cast Alloy A356 reinforced with Dual-Size B4C Particles

“…luminum alloys find application in diverse fields owing to their high strength-to-weight ratio, low cost, and ease of fabrication [1][2][3]. Substituting the base aluminum alloys with particulate composites has the advantage of improving the mechanical strength parameters without seriously disturbing the thermal and electrical conductivities and other properties A [4][5][6][7]. The common reinforcement particles used in AMMCs are graphite, SiO 2 , SiC, Al 2 O 3 and B 4 C used in small percentages of about 2 to 8% [8][9][10][11][12].…”