The calculated Al-Li-Mg-Si phase diagram was used to investigate the equilibrium phase distribution as a function of temperature for the Li-contained 6000 series alloys. Some selected sections through the diagram were presented with a brief explanation.R.Chen...
(see experimental points in the Al–Mg phase diagram, Fig.1) during long time (between 4000 h at 210 °C and 600 h at 440 °C), and then quenched in water. The accuracy of the annealing temperature was ±2 °C. After quenching, samples were embedded in resin and then mechanically ...
Precipitation-hardened aluminium alloys typically obtain their strength by forming second-phase particles, which, however, often have a negative effect on formability. To enable both lightweight construction and forming of complex parts such as body pane
As expected from the Mg-Al binary phase diagram19,20, interfacial layers (γ and βlayers) are readily formed by the diffusion even at relatively low temperatures, and are grown with increasing homogenizing temperature or time11,12,24,25. In the H6 sheet, the interfacial layers are ...
It is suggested that the inhibitive effect of ambient concentrations of CO2 on the corrosion of Mg and, Mg–Al alloys reported by [28] and further investigated in a recent study [29] may be part of the explanation. The corrosion of both Mg and Al in aqueous solution is known to be ...
(Fig.2b, c) indicates that corona formation was synchronous with deformation that produced the crenulations in the matrix foliation. In the inner collar, muscovite and margarite show no preferred orientation. One possible explanation for this is that the inner corona postdates the deformation vis-...
The calculated Al-Li-Mg-Si phase diagram was used to investigate the equilibrium phase distribution as a function of temperature for the Li-contained 6000 series alloys. Some selected sections through the diagram were presented with a brief explanation.R.Chen...
Figure 1.Schematic diagram of the tensile sample (unit: mm). 3. Results and Discussion 3.1. Phase and Microstructures Evolution Figure 2shows the experimental procedures of the rapidly solidified ribbons and hot extruded rods. As shown inFigure 2a, for the prepared alloy ribbons with 3–5 mm ...
Prior to the 1970s, the anodic dissolution theory was the dominant explanation for the SCC mechanisms in aluminum alloys. This theory posits that the difference in electrochemical potential between the grain boundary precipitates and the precipitate-free zones or the matrix causes preferential ...
Increasing the Sb additions in the ZMA alloy leads to a wider solidification temperature range, increasing the liquidus due to a shift away from the eutectic composition towards the Zn-rich part of the phase diagram. This is caused by the rise in proportion of Mg3Sb2, thereby reducing the amo...