The aging processes in Cu 3.2Ni 0.75Si alloy were examined by means of transmission electron microscope , X ray diffractometer and high resolution transmission electron microscopy. It is concluded that before the form...The aging processes in Cu 3.2Ni 0.75Si alloy were examined by means of transmission electron microscope , X ray diffractometer and high resolution transmission electron microscopy. It is concluded that before the formation of Ni 2Si phase there exist continuous phase transformation processes, namely ordering, spinodal decomposition. Thereafter, the solute rich zones form Ni 2Si phase which is coherent with the matrix.展开更多
Copper alloyed with various compositions of nickel and tin were cast into molds under argon atmosphere.The cast rods were homogenized,solution heat treated,followed by aging for different time duration.The specimens w...Copper alloyed with various compositions of nickel and tin were cast into molds under argon atmosphere.The cast rods were homogenized,solution heat treated,followed by aging for different time duration.The specimens were characterized for microstructure and tested for microhardness and wear rate.A hybrid model with a linear function and radial basis function was developed to analyze the influence of nickel,tin,and aging time on the microhardness and tribological behavior of copper-nickel-sin alloy system.The results indicate that increase in the composition of nickel and tin increases the microhardness and decreases the wear rate of the alloy.The increase in the concentration of nickel and tin decreases the peak aging time of the alloy system.展开更多
文摘The aging processes in Cu 3.2Ni 0.75Si alloy were examined by means of transmission electron microscope , X ray diffractometer and high resolution transmission electron microscopy. It is concluded that before the formation of Ni 2Si phase there exist continuous phase transformation processes, namely ordering, spinodal decomposition. Thereafter, the solute rich zones form Ni 2Si phase which is coherent with the matrix.
文摘Copper alloyed with various compositions of nickel and tin were cast into molds under argon atmosphere.The cast rods were homogenized,solution heat treated,followed by aging for different time duration.The specimens were characterized for microstructure and tested for microhardness and wear rate.A hybrid model with a linear function and radial basis function was developed to analyze the influence of nickel,tin,and aging time on the microhardness and tribological behavior of copper-nickel-sin alloy system.The results indicate that increase in the composition of nickel and tin increases the microhardness and decreases the wear rate of the alloy.The increase in the concentration of nickel and tin decreases the peak aging time of the alloy system.
