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...

The main task of this work was to study the influence of the cooling conditions after homogenization of the 6082 aluminium alloys. The effect of the solution heat treatment temperature on the mechanism and ageing kinetics of the two commercial wrought aluminum alloys 6005 and 6082 was also analyzed. The alloys were heat treated—T4 with a wide range of solution heat treatment temperature from 51...

The Al-Mg-Ge alloy is one of the age-hardening aluminum alloy after solution heat treatment. It has been proposed that the age-precipitation behavior of Al-Mg-Ge alloy is different from that of Al-Mg-Si alloy according to our previous works about the microstructure on Al-Mg-Ge alloy over-aged at 523K. For example, The hardness of peak aged Al-1.0mass%Mg2Ge alloy is higher than that of Al-1.0mas...

the 17-4ph alloy is a martensitic stainless steel with 3–5 wt% cu, strengthened by the precipitation hardening. due to excellent mechanical properties, corrosion resistance and ease of heat treatment, this alloy has unique applications in nuclear power plants and marine constructions. in this paper, the influence of ageing heat treatment, solution annealing followed by ageing at 480, 550 and 62...

The effect of long period stacking ordered (LPSO) phase and γ' precipitates on the ageing behavior and mechanical properties of the extruded Mg-8.2Gd-3.8Y-1.0Zn-0.4Zr (wt.%) alloy was investigated. The results show that more β' phases precipitate during ageing treatment in the LPSO phase containing alloy so that the LPSO phase containing alloy exhibits a higher age-hardening response than the γ...

Transition metal diborides are ceramic materials with potential applications as hard protective thin films and electrical contact materials. We investigate the possibility to obtain age hardening through isostructural clustering, including spinodal decomposition, or ordering-induced precipitation in ternary diboride alloys. By means of first-principles mixing thermodynamics calculations, 45 ter...

At high latitude the hard electron precipitation associated with auroral activity is a major source of ionization for the D-region, one consequence being the absorption of radio waves. Direct measurements of the D-region electron density are not readily available, however. This paper investigates the relationship between the electron density at altitudes between 100 and 70 km and the total radi...

Recently, CuZr-based bulk metallic glass (BMG) composites reinforced by the TRIP (transformation-induced plasticity) effect have been explored in attempt to accomplish an optimal of trade-off between strength and ductility. However, the design of such BMG composites with advanced mechanical properties still remains a big challenge for materials engineering. In this work, we proposed a technique...