Kontinuierliches Verbundgießen von rotationssymmetrischen Cu-Al-legierungsbasierten Halbzeugen
Zusammenfassung der Projektergebnisse
In this project the interface formation mechanisms and the mechanical response of new brass/aluminium hybrids fabricated through compound casting was investigated. The findings provide insights into the behaviour of these new hybrid components, which are useful in optimizing their production and improving their performance. The combination of theoretical, experimental, and numerical methods allowed for a comprehensive analysis of the hybrid. The interface formation mechanisms were investigated through solid-liquid interdiffusion experiments. Results reveal that the planar reaction zone developed during the compound casting between brass and aluminium is very sensitive to temperature. It was concluded that the layers formed at higher temperatures, as a result of solid-liquid interactions, are not stable and tend to decompose into different phases if cooling rates are not fast enough, as those achieved by quenching. A model was developed to predicted the formation of the primary intermetallic layer’s formation as a function of time and temperature. The continuous casting production of the brass/aluminum hybrid was extensively investigated. The characterization of the interface of brass/aluminum hybrids fabricated through compound casting were analyzed within this project. Continuous compound casting exhibits resource benefits compared to classic solid-to-solid joining processes and is, therefore, an attractive method to produce brass/aluminum hybrids. To improve knowledge of this method applicability to brass/aluminum hybrids, the investigations were conducted using components consisting of CuZn37 (core material) and AA6060 or AA7075 (shell material). The dissolution and diffusion between the joining partners lead to the formation of the interface as observed for the solid-liquid interdiffusion experiments and secondary intermetallic layers were observed when cooling rates were low. The different casting processes were accompanied by simulation studies. These helped to extract key figures to evaluate the technological potential of each operation. The experimental analysis and numerical study of the structural mechanical behavior of the compounds helped to describe the deformation and fracture characteristics. Furthermore, these findings represent the basis for future investigations into the thermomechanical postprocessing of hybrid components.
Projektbezogene Publikationen (Auswahl)
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Interface Formation and Characterization of Brass/Aluminum Compounds Fabricated Through Die Casting and Semi-Continuous Casting. International Journal of Metalcasting, 14(2), 564-579.
Greß, Thomas; Glück, Nardi Vanessa; Mittler, Tim; Schmid, Simon; Buchberger, Paul; Tonn, Babette & Volk, Wolfram
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Experimental and numerical investigations into the deformation and fracture behavior of intermetallics and base materials in as-cast Al-Cu compounds. Materials Today Communications, 25, 101278.
Greß, Thomas; Gruber, Maximilian; Stahl, Jens; Wittmann, Simon; Steinlehner, Florian; Glück, Nardi Vanessa; Tonn, Babette & Volk, Wolfram
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Modelling of intermetallic layers formation during solid-liquid joining of dissimilar metallic materials. IOP Conference Series: Materials Science and Engineering, 861(1), 012058.
Glück, Nardi V.; Greß, T.; Tonn, B. & Volk, W.
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Vertical continuous compound casting of copper aluminum bilayer rods. Journal of Materials Processing Technology, 288, 116854.
Greß, Thomas; Glück, Nardi Vanessa; Schmid, Simon; Hoyer, Julika; Rizaiev, Yevgen; Boll, Torben; Seils, Sascha; Tonn, Babette & Volk, Wolfram
