Application of Response Surface Methodology for Parameter Optimization of Aluminum 7075 Thixoforming Feedstock Billet Production

Megalingam, A.; Ahmad, Abu Zaharin; Alang, N. A.; Alias, J.; Razak, Norhaida Ab

doi:10.1007/s11665-022-07535-4

Cited by 4 publications

(1 citation statement)

References 40 publications

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“…Although various rheological tests under different conditions were conducted for almost 50 years, trying to associate thixotropy phenomenon to their globular microstructure. As an example, we could mention steady or unstable state as well as ramps in strain rate or shear stresses [1][2][3][4][5][6]. Likewise, previous works in which models and simulations studies were performed, have had a positive impact in understanding previous mention processes, and find an applicability on industrial sector.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Rheological Models to Simulate Die Filling Process of A356 Semisolid Alloy

Sanjuan-Sanjuan,

Galindo-Solano,

Ramirez-Calera

et al. 2023

SSP

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Semisolid materials with a non-dendritic microstructure have a complex rheological behavior such as pseudo-plasticity and thixotropy. These properties affect filling and solidification processes during, casting; thus, simulation plays a vital role since it avoids limitations improving cast and production performance. In order to study and A356 aluminum semisolid alloy flow, a Computational Fluid Dynamics (CFD) software (ANSYS) is used to simulate the die filling process in a rectangular mold. Three non-Newtonian constitutive equations are modeled in this work: the Cross equation, the Power-law equation and the Carreau equation. The rheological parameters for each equation were obtained from experimental data reported in the literature. The results showed that the non-Newtonian models predicted better the filling behavior and the pressure distribution than the Newtonian model.

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