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Article

Effect of Solidification Rates at Sand Casting on the Mechanical Joinability of a Cast Aluminium Alloy

Department of Mechanical Engineering, Paderborn University, Mersinweg 7, 33100 Paderborn, Germany
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Academic Editor: Alexander McLean
Metals 2021, 11(8), 1304; https://doi.org/10.3390/met11081304
Received: 30 June 2021 / Revised: 13 August 2021 / Accepted: 14 August 2021 / Published: 17 August 2021
(This article belongs to the Special Issue Casting and Rolling of Alloys)
Implementing the concept of mixed construction in modern automotive engineering requires the joining of sheet metal or extruded profiles with cast components made from different materials. As weight reduction is desired, these cast components are usually made from high-strength aluminium alloys of the Al-Si (Mn, Mg) system, which have limited weldability. The mechanical joinability of the cast components depends on their ductility, which is influenced by the microstructure. High-strength cast aluminium alloys have relatively low ductility, which leads to cracking of the joints. This limits the range of applications for cast aluminium alloys. In this study, an aluminium alloy of the Al-Si system AlSi9 is used to investigate relationships between solidification conditions during the sand casting process, microstructure, mechanical properties, and joinability. The demonstrator is a stepped plate with a minimum thickness of 2.0 mm and a maximum thickness of 4.0 mm, whereas the thickness difference between neighbour steps amounts to 0.5 mm. During casting trials, the solidification rates for different plate steps were measured. The microscopic investigations reveal a correlation between solidification rates and microstructure parameters such as secondary dendrite arm spacing. Furthermore, mechanical properties and the mechanical joinability are investigated. View Full-Text
Keywords: cast aluminium alloy; sand casting; microstructure; dendrite arm spacing; mechanical joinability; clinching cast aluminium alloy; sand casting; microstructure; dendrite arm spacing; mechanical joinability; clinching
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MDPI and ACS Style

Neuser, M.; Grydin, O.; Andreiev, A.; Schaper, M. Effect of Solidification Rates at Sand Casting on the Mechanical Joinability of a Cast Aluminium Alloy. Metals 2021, 11, 1304. https://doi.org/10.3390/met11081304

AMA Style

Neuser M, Grydin O, Andreiev A, Schaper M. Effect of Solidification Rates at Sand Casting on the Mechanical Joinability of a Cast Aluminium Alloy. Metals. 2021; 11(8):1304. https://doi.org/10.3390/met11081304

Chicago/Turabian Style

Neuser, Moritz, Olexandr Grydin, Anatolii Andreiev, and Mirko Schaper. 2021. "Effect of Solidification Rates at Sand Casting on the Mechanical Joinability of a Cast Aluminium Alloy" Metals 11, no. 8: 1304. https://doi.org/10.3390/met11081304

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