Optical and Scanning Electron Microscope Studies of Recycled (Secondary) Al-Si Cast Alloys

Abstract:

Production of primary Al- alloys belong to heavy source fouling of life environs. Care of environment in industry of aluminium connects with the decreasing consumptions resource as energy, materials, water and soil, with increase recycling and extension life of products. Recycled (secondary) aluminium alloys are made out of Al-scrap and workable Al-garbage by recycling. Applications of these alloys in recent years increase especially in automotive industry (dynamic exposed cast, engine parts, cylinder heads, pistons and so on). Controlling the microstructure of secondary aluminium cast alloy is very important, because these alloy containing more of additions elements, that forming various intermetallic phases in the structure. Improved mechanical properties of secondary alloys are strongly dependent upon the morphologies, type and distribution of the second phases, which are in turn a function of alloy composition and cooling rate. The presence of additional elements as Mg, Mn, Fe or Cu allows many complex intermetallic phases to form, which make characterization non-trivial. A combination of different analytical techniques (light microscopy, scanning electron microscopy (SEM) upon deep etching and energy dispersive X-ray analysis (EDX)) were therefore been used for the various phases identification.

• Periodical: Solid State Phenomena (Volumes 203-204)
• Pages: 266-271
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.203-204.266
• Online since: June 2013
• Authors: Lenka Hurtalová, Eva Tillová, Mária Chalupová, Jaroslaw Piątkowski
• Keywords: Energy Dispersive X-Ray (EDX) Analysis, Light Microscopy, Scanning Electron Microscope (SEM), Secondary Aluminium Cast Alloy

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