【摘 要】
：
Alloying elements,present in the aluminum solid solution or the precipitates,influence the corrosion resistance of Al-Mg-Mn-Zn alloys.In this study,sensitizing
【机 构】
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State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,
论文部分内容阅读
Alloying elements,present in the aluminum solid solution or the precipitates,influence the corrosion resistance of Al-Mg-Mn-Zn alloys.In this study,sensitizing treatment was applied to an Al-Mg-Mn-Zn alloy to modify the precipitation at the grain boundaries or in the grains.Transmission electron microscopy (TEM) and scanning electron microscope (SEM) were used to characterize various second-phase particles and determine their orientation relationship with the Al matrix.After sensitizing treatment,τ-phase (Mg32(Al,Zn)49) is observed to precipitate along the grain boundaries in a coarser size,producing a discontinuous grain boundary precipitate structure.In addition,Mn-rich particles are found to form with various shapes,such as global,plate and rhombus.
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