High-resolution electron microscopy was employed to characterize the interface structure of a cast Al-Mg-Si-Bi-Pb aluminium(6262)-based composite reinforced by alpha alumina particles with a trace of beta alumina in order to investigate the behaviour of alloying elements in cast composites. Except for a few primary Mg2Si particles, few reaction products were detected at the interface of Al/alph...

Aluminum alloys of the 6xxx series which contain excess Si or Cu are well used for the automotive applications because of the high age-hardening response. The effect of addition of small amount of Sn on the two-step aging behavior in 1.2%Mg2Si-0.5%Si in excess alloy and 1.2%Mg2Si-0.7%Cu alloy was investigated by means of hardness measurement, differential scanning calorimetry, and transmission ...

The effect of the Mg/Si ratio Al-2.5Li-1Cu-0.8Mg-0.8Si, Al-2.5Li-1Cu-1.6Mg-0.8Si, and Al-2.5Li-1Cu-2.4Mg-0.8Si alloys on microstructure evolution mechanical properties was investigated. results show that primary phases their morphologies in as-cast are found to vary with ratio. improvement promotes formation Mg2Si phase at expense AlLiSi phase. Moreover, a tiny amount TB-Al7.5Cu4Li transforms i...

The effect of solution temperature on the aging hardening behavior Al-15%Mg2Si(-1%Cu) alloys was studied by characterizing precipitation behaviors nano-precipitates. After rises from 520 °C to 550 °C, more solute atoms are available for precipitation, and formation activation energies precipitates (?'' S) decrease. So ?''/?? in Al-15%Mg2Si alloy S Al-15%Mg2Si-1%Cu is accelerated at a which enha...

Controlling the size and morphology of primary eutectic Mg2Si phase via modification refinement (i.e., Ca P addition) in Al-Mg2Si-based alloys containing higher percentages Si Mg is great necessity to ensure their high performance. The present investigation mainly aimed elucidate effect on nucleation growth pattern high-purity Al-13.1 wt.% near-eutectic with without additions Ca. It was found t...

The microstructure and tensile properties of the thixoforged in situ Mg2Sip/AM60B composite were characterized in comparison with the as-cast composite and thixoforged AM60B. The results indicate that the morphology of α-Mg phases, the distribution and amount of β phases and the distribution and morphology of Mg2Si particles in thixoforged composite are completely different from those in as-cas...

Blown-powder laser surface alloying was performed on the magnesium alloy AZ91D with Al-Si alloy powder to improve corrosion resistance. Characterization by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and x-ray diffraction (XRD) analysis revealed that intermetallic compounds (IMCs) of Mg2Si, Al12Mg17 and Al3Mg2 were formed in the matrix of α-Mg and Al solid solutions...

An Aluminum based in-situ alloy reinforced with Mg2Si and Si hard particles produced by casting Al-6Si-0.5Mg alloy. The microstructure, tensile properties and fracture behavior of the alloy were investigated and the results show that the Mg2Si and Si hard particles produced by precipitation hardening have great effects. The homogenized (24hr at 500 o C) and solutionized (2hr at 540 o C) cast al...