Application of magnesium alloy is restricted by its bad formability and low corrosion
resistance. In order to resolve these problems, rolling-bonding has been tried as a new method.
Pre-heating, rolling and annealing were used in the process of bonding, and aluminum cladding
magnesium alloys obtained. The effects of many parameters in the processes of pre-heating, rolling
and heat-treatment on bonding strength have been analyzed, and the mechanism of rolling-bonding
been studied. It was found that intermediate phase played an important role in the bonding. Good
bonding of aluminum cladding magnesium alloys achieved after annealing at 200oC for 1 hour.
Stronger (0001) basal plane textures mainly include two types: and in AZ31 magnesium alloy thin sheet were formed after hot-rolling. The texture types of hot-rolled AZ31 magnesium alloy thin sheet after annealing at 523K and 673K respectively were as same as that of hot-rolled thin sheet without annealing, but texture intensities became weaker, especially after annealing at 673K. The strong texture of hot-rolled thin sheet caused anisotropy of mechanical properties (tensile strength b, yield strength s and elongation ) significantly , and the anisotropy reduced with the decrease of texture intensity after annealing. Besides texture, the grain shape also effects anisotropy of mechanical properties. The anisotropy becames more significantly with the increase of relative difference of grain diameter between transverse and longitudinal directions.
Deep cryogenic treating (DCT) was applied on Cu-14Fe and Cu-8Cr in-situ composites and its effects on mechanical property and electrical conductivity of the composites were investigated. For comparison, the effects of DCT on properties of the corresponding composites with 0.1%Ag alloying (i.e. Cu-14Fe-0.1Ag and Cu-8Cr-0.1Ag) were also investigated. The results showed that the ultimate tensile strengths of Cu-14Fe and Cu-8Cr were greatly raised by 106MPa and 56MPa after DCT, respectively, whereas those of the Cu-14Fe-0.1Ag and Cu-8Cr-0.1Ag remained unchanged. The increments of electrical conductivity in Cu-14Fe and Cu-8Cr were much higher than those in corresponding Cu-14Fe-0.1Ag and Cu-8Cr-0.1Ag. Before DCT, the electrical conductivities of Cu-14Fe and Cu-8Cr were lower than those of the Cu-14Fe-0.1Ag and Cu-8Cr-0.1Ag, respectively; whereas after DCT, the electrical conductivities of Cu-14Fe and Cu-8Cr were higher than those of the corresponding composites with 0.1%Ag micro-alloying. The possible mechanisms involved in the effects of DCT on the properties of composites were discussed in this paper
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