Journal
ARCHIVES OF METALLURGY AND MATERIALS
Volume 66, Issue 1, Pages 15-23Publisher
POLSKA AKAD NAUK, POLISH ACAD SCIENCES, INST METALL & MATER SCI PAS
DOI: 10.24425/amm.2021.134753
Keywords
Al-Si-Cu cast alloys; natural and artificial ageing; metallography; mechanical properties; hot tearing
Categories
Funding
- VEGA grant agency [1/0494/17]
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Recycling of aluminium returnable material through its reuse is now an essential component of the production of aluminium alloy castings. The goal is to find the right balance between the primary alloy and returnable material in order to maintain the quality of the casting. Experimental evaluation of alloys showed that changes in properties occurred with an increase in returnable material, with degradation observed beyond a certain ratio.
Recycling of aluminium returnable material through its reuse is now an essential component of the production of aluminium alloy castings. The main goal is to find a suitable ratio of the primary alloy and the returnable material in the batch, thus determining the right compromise between the price and the quality of the casting. Experimental alloys were evaluated by thermal analysis, combination of structural analytical techniques and selected mechanical properties. The alloys were also subjected to tearing susceptibility testing. The increase in the returnable material amount resulted in changes in the alloy properties at the first increase in volume to 20%. After exceeding the balanced ratio (50:50), there was considerable degradation of the microstructure, failure to achieve the minimum values of some mechanical properties required by the standard, and the alloy showed increased susceptibility to tearing. Recycling of aluminium returnable material through its reuse is now an essential component of the production of aluminium alloy castings. The main goal is to find a suitable ratio of the primary alloy and the returnable material in the batch, thus determining the right compromise between the price and the quality of the casting. Experimental alloys were evaluated by thermal analysis, combination of structural analytical techniques and selected mechanical properties. The alloys were also subjected to tearing susceptibility testing. The increase in the returnable material amount resulted in changes in the alloy properties at the first increase in volume to 20%. After exceeding the balanced ratio (50:50), there was considerable degradation of the microstructure, failure to achieve the minimum values of some mechanical properties required by the standard, and the alloy showed increased susceptibility to tearing.
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