Interface Formation and Characterization of Brass/Aluminum Compounds Fabricated Through Die Casting and Semi-Continuous Casting

Vertical continuous compound casting of copper aluminum bilayer rods

“…Value HTC between CuZn37 and AA7075 50, 000 − 990, 000 W m -2 K -1 HTC between CuZn37 and graphite mold 800 − 80, 000 W m -2 K -1 HTC between AA7075 and graphite mold 4, 000−80, 000 W m -2 K -1 HTC between graphite mold and copper cooler (substrate casting stage) 50, 000 W m -2 K -1 HTC between graphite mold and copper cooler (compound casting stage) The thermophysical properties of CuZn37 and AA7075 were examined using differential scanning calorimetry (DSC), laser flash analysis (LFA), dilatometry, and thermogravimetric analysis. Details on the testing methods and results are published in (Greß, Mittler et al, 2019) and (Greß, Glück Nardi et al, 2020). A concise summary of important thermophysical data is presented in Table 2.…”

“…Table 2: Thermophysical data of CuZn37 and AA7075 according to (Greß, Mittler et al, 2019) and (Greß, Glück Nardi et al, 2020) The structural analysis of as-cast bilayer samples was performed using light optical microscopy (LOM) and scanning electron microscopy (SEM). APT was used to analyze the phase composition and element distribution at a nanoscale.…”

“…The coarse microstructure of θ-AlCu phases inhibits the melt flow, which leads to unfavorable feeding conditions. Figure 8: EDS line scan across the interface of as-cast brass/aluminum bilayer samples and diffusion path projection onto isothermal section according to (Greß, Glück Nardi et al, 2020) Figure 9 shows the results of the EDS mapping and EBSD of the suspected τ-AlCuZn/γ-CuZn layer. Both the γ-CuZn and τ-AlCuZn phase exhibit a cubic crystal structure.…”

“…A particular feature is the arrangement of brass as the core material and aluminum as the shell. The present developments are based on the initial investigations on static compound casting and multi-step, semi-continuous compound casting, which were published in (Greß, Glück Nardi et al, 2020). The experimental process analysis is supported by an FEM simulation study, which helped to extract thermal profiles in the vicinity of the geometrical interface.…”

Interfacial Microstructure Formation in Al7SiMg/Cu Compound Castings

“…Then, when this metal has reached a certain temperature, T Substrate , the second metal is cast onto it. [14][15][16] These processes allow production of complex geometries, as well as reducing the process time due to the direct insertion of the solid material or the casting of the first material. This increases the process efficiency and lowers cost.…”