Lee, JC Seok, HK Lee, HI 2024-01-21T08:34:25Z 2024-01-21T08:34:25Z 2021-09-03 2003-08 1598-9623 https://pubs.kist.re.kr/handle/201004/138383 The effects of the viscosity, gate speed, and gate geometry on the flow behaviors of Al alloys in molten and semi-solid states were studied by direct observations of the flow patterns during die filling. Two different fluids, thixotropic fluid (semi-solid Al alloy) and Newtonian fluid (molten Al alloy), were chosen as the model fluids for monitoring the differences in flow patterns during die filling. High-speed photography was employed to record the real time flow patterns. Qualitative assessments on the critical gate speed were made based on the experimental results. The experimental results were also compared with results predicted based on the Reynolds number. Although the critical gate speed varies depending on the gate geometry, it is less than similar to2.5 m/sec in semi-solid forming, while it ranges from 0.30similar to0.5 m/sec in squeeze casting. English KOREAN INST METALS MATERIALS Effect of the gate geometry and the injection speed on the flow behaviors of a semi-solid A356 Al alloy Article 10.1007/BF03027187 1 METALS AND MATERIALS INTERNATIONAL, v.9, no.4, pp.351 - 357 METALS AND MATERIALS INTERNATIONAL 9 4 351 357 scie scopus kci other 000185012100004 2-s2.0-1842576843 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article semi-solid forming squeeze casting turbulence laminar aluminum