Pressurized solidification of semi-solid aluminum die casting alloy A356

Microstructure and mechanical properties of rheo-squeeze casting AZ91-Ca magnesium alloy prepared by gas bubbling process

“…The amount of porosity in rheo-squeeze casting AZX912 samples decreased accordingly with the increase of applied pressure. Guo et al [28] found that, in rheo-squeeze casting of A356 Al alloy, with increasing the applied pressure from atmospheric to 70 MPa, density increased markedly, but the density difference between the samples formed at 70 and 120 MPa was not appreciable. They concluded that 70 MPa was the critical pressure at which a complete contact between the metal and the die was realized and nearly eliminated gas and shrinkage porosities could be obtained.…”

Correlation of microstructure with mechanical properties and fracture behavior of A356-T6 aluminum alloy fabricated by expendable pattern shell casting with vacuum and low-pressure, gravity casting and lost foam casting

“…The solidification of the molten metal under pressure can drive the molten metal in the liquid-solid two-phase region to feed into solid skeleton gap and prevent generation of the porosity defects. Guo et al [17] have reported that the application of pressure during solidification of the molten metal reduces the porosity defects formed. During the EPSC-VL process, the filling capability and feeding capacity of the molten metal are significantly enhanced compared with the LFC and GC processes because the filling and solidification of the molten metal are carried out under pressure and vacuum.…”

Solidification of Mg-Zn-Y Alloys at 6 GPa Pressure: Nanostructure, Phases Formed, and Their Stability

“…The melting point of the alloy, the solution redistribution and the undercooling have all been changed under conditions of high-pressure solidification (Ref [10][11][12] so that microstructures have been produced that are much different from those formed during solidification at atmospheric pressure. Furthermore, high-pressure solidification can lead to the formation of new phases or new structures and can influence phase nucleation or grain growth (Ref [13][14][15][16][17][18][19].…”