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Proceedings of the International Conference on Digital Manufacturing –
Volume 2
microstructure varied significantly with changes in pouring
temperature and holding time. A higher cooling rate was found to
promote the formation of more spheroidal structures.
Additionally, the fraction solid at the time of quenching played a
critical role in microstructure development, and higher fraction
solids led to more spherical morphologies.
Overall, the research confirmed that optimising pouring
temperature and holding time within the DTM process can
effectively produce the desired spheroidal microstructure in
Aluminium 7075. [12]. The findings highlight the importance of
controlling cooling rates and fraction solid during quenching to
achieve optimal microstructure for SSM processing.
Figure 35: Schematic diagram of the DTM setup (Razak, Ahmad,
Rashidi, & Naher, 2021).
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