Evolution of Primary Phase in A357 Semi-solid Aluminum Alloy During Reheating and Forming Process;

Correlation between crystallization kinetics of amorphous alloys and primary phases during crystallization;

Influence of RE Element Y on Morphology of Primary Phase in A356 Aluminum Alloy;

Heat transfer in two-stage slitless mold for soft-contact electromagnetic continuous casting and thickness of initial solidified shell were analyzed through numerical simulation method.

The results indicated that the particles of α-Al phase,which were non-existent for non-stirring casting of Al-20%Mg2Si hypereutectic alloy,appeared for electromagnetic agitation and the primary Mg2Si with cluster distributed on the matrix of alloy.

The experimental results show that the Al-P or Al-Ti-B can refine and modify primary Mg2Si, and the refinement and modification efficiency of Al-P master alloy can be improved after the addition of Al-Ti-B.

Rheological behavior of semisolid A356 alloy with different morphology of primary α phases;

The crack propagation behavior of primary α phase under tension and cyclic load has been observed in-situ by SEM for near-α type TA15 titanium alloy.

Effects of Cooling Rate on Primary Si in Hypereutectic Al-Si Alloy;

This thesis studied the effect of cooling rate and the stirring intensity on the equivalent diameter and the aggregation of the primary Si particles during the producing of the semi-solid slurry by electromagnetic stir, so offered foundation for producing largely the hypereutectic Al-Si alloy semi-solid slurry.

Growth behavior of primary silicon in hypereutectic Al-Si alloy;

The effects of electromagnetic vibration on the distribution and morphology of primary silicon in the Al-18%Si alloy have been investigated systematically.

The purification efficiency of Al- Si 24% hypereutectic alloy and the macro-distribution of primary silicon in the same power and different time were investigated through the high frequency magnetic field.