The process of the directed oxidiation of alloy Al-1%Mg-7%Si was invertigated by X-Ray diffraction (XRD). optical microscopy, scanning electron microscopy (SEM) and energy dispersive spectrometer(EDS) ,which included ...The process of the directed oxidiation of alloy Al-1%Mg-7%Si was invertigated by X-Ray diffraction (XRD). optical microscopy, scanning electron microscopy (SEM) and energy dispersive spectrometer(EDS) ,which included evolution of the surface of the melt in the incubation period, nucleation of Al2O3/metal composite and microstruc-ture of Lanxide material its growth front . Some new results about the mechanism of the for mation of Al2O3 are involved.展开更多
Using the experimental and theoretical methods, the tensile strengths and fracture mechanisms of AI2O3 short fiber reinforced AI-Mg alloy matrix composite at elevated temperatures were researched. The interfacial micr...Using the experimental and theoretical methods, the tensile strengths and fracture mechanisms of AI2O3 short fiber reinforced AI-Mg alloy matrix composite at elevated temperatures were researched. The interfacial microstructural characteristics and the fracture surfaces of the composite at different temperatures were observed by transmission electron microscope (TEM) and by scanning electron microscope (SEM), respectively. Then, from the results of microscopic observation, the fracture mechanisms of the composite at different temperatures are discussed. Finally, the tensile strengths of the composite at elevated temperatures were predicted by statistical integration average (SIA) method with the consideration of various fracture mechanisms. It was shown that the strengths and fracture mechanisms of the composite at elevated temperature (300℃) were significantly different from those at room temperature due to the variations of interfacial bonding states. The tensile strengths predicted by the SIA method at elevated temperatures agreed well with the experimental results.展开更多
文摘The process of the directed oxidiation of alloy Al-1%Mg-7%Si was invertigated by X-Ray diffraction (XRD). optical microscopy, scanning electron microscopy (SEM) and energy dispersive spectrometer(EDS) ,which included evolution of the surface of the melt in the incubation period, nucleation of Al2O3/metal composite and microstruc-ture of Lanxide material its growth front . Some new results about the mechanism of the for mation of Al2O3 are involved.
文摘Using the experimental and theoretical methods, the tensile strengths and fracture mechanisms of AI2O3 short fiber reinforced AI-Mg alloy matrix composite at elevated temperatures were researched. The interfacial microstructural characteristics and the fracture surfaces of the composite at different temperatures were observed by transmission electron microscope (TEM) and by scanning electron microscope (SEM), respectively. Then, from the results of microscopic observation, the fracture mechanisms of the composite at different temperatures are discussed. Finally, the tensile strengths of the composite at elevated temperatures were predicted by statistical integration average (SIA) method with the consideration of various fracture mechanisms. It was shown that the strengths and fracture mechanisms of the composite at elevated temperature (300℃) were significantly different from those at room temperature due to the variations of interfacial bonding states. The tensile strengths predicted by the SIA method at elevated temperatures agreed well with the experimental results.
