Thixoforming of Hypereutectic AlSi12Cu2NiMg Automotive Pistons
The microstructure and mechanical properties of thixoformed AlSi12Cu2NiMg (AЛ25) aluminium alloy were investigated. Cooling slope method was employed in order to produce non-dendritic billets. Thixoforming process parameters were determined as follows: die temperature of 250 °C, billet temperature of 555 - 560 °C, punch velocity of 7 mm/s. Mechanical properties of automotive piston with ultimate strength of 309 MPa, yield strength of 274 MPa and elongation of 6.8 % in the T6 condition were obtained successfully, implying success of advantages of cooling slope method.
Qiang Zhu, Ahmed Rassili, Stephen P. Midson and Xiao Gang Hu
A.B. Semenov et al., "Thixoforming of Hypereutectic AlSi12Cu2NiMg Automotive Pistons", Solid State Phenomena, Vol. 285, pp. 446-452, 2019