Affiliation:
1. Czech Technical University in Prague
2. Czech Technical University in Prague, Faculty of Mechanical Engineering
Abstract
Aluminum alloys are widely used in automotive industry due to their low density and good corrosion resistance. This category includes alloys based on AlSiMg which are suitable for load bearing parts operating under higher temperatures. This paper deals with analysis of influence of deformation parameters and heat treatment on structure and mechanical properties of EN AW-6082 (AlSi1MgMn) alloy manufactured by horizontal cast module technology. Casted rods were used as a billet, which was formed to defined height by hot open-die forging. Subsequently the precipitation hardening was used as heat treatment. Changes in microstructure were evaluated based on the metallographic analyzes performed by light optical microscopy and scanning electron microscopy using an energy dispersive X-ray spectrometry and electron backscatter diffraction. Mechanical properties were determined by uniaxial tensile test and hardness testing. The results showed, that due to the process parameters, no significant structural changes were observed in the surface layer of forging. However, microstructure is significantly inhomogeneous in the core due to the dynamic softening processes. Mechanical properties are increasing which is significantly influenced by the type and distribution of precipitates emerging during the artificial aging.
Publisher
Trans Tech Publications, Ltd.
Subject
Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics
Reference9 articles.
1. M. Muzyk, Z. Pakieła, K.J. Kurzydłowski, Generalized Stacking Fault Energies of Aluminum Alloys–Density Functional Theory Calculations. Metals, 8 (10), 2018, p.823.
2. Y. Birol, O. Ilgaz, S. Akdi, E. Unuvar, Comparison of Cast and Extruded Stock for the Forging of AA6082 Alloy Suspension Parts. Advanced Materials Research, 939, 2014, p.299–304.
3. G. Mrówka-Nowotnik, J. Sieniawski, M. Wierzbińska, Intermetallic phase particles in 6082 aluminium alloy. Archives of Materials Science and Engineering, Vol. 28 (nr 2), 2007, p.69–76.
4. M.H. Khan, A. Das, Z. Li, H.R. Kotadia, Effects of Fe, Mn, chemical grain refinement and cooling rate on the evolution of Fe intermetallics in a model 6082 Al-alloy. Intermetallics, 132, 2021, p.107132.
5. I. Schindler, P. Kawulok, V. Očenášek, P. Opěla, R. Kawulok, S. Rusz, Flow Stress and Hot Deformation Activation Energy of 6082 Aluminium Alloy Influenced by Initial Structural State. Metals, 9 (12), 2019, p.1248.