Abstract
Cu–15%Ni–8%Sn alloy was prepared by continuous unidirectional solidification (CUS) processing and the as-cast CUS Cu–15%Ni–8%Sn alloy was homogenized. The evolution of microstructure and composition distribution of as-cast and annealed CUS Cu–15%Ni–8%Sn alloy was analyzed. The results show that the microstructure of as-cast CUS Cu–15%Ni–8%Sn is mainly composed of coarse columnar grains and there exist segregation phenomenon in the grain boundaries. After annealing at temperature of 850°C for 30 min, it was found that the composition of the alloy began to become uniform and the solutes gathered at the grain boundaries diffused into the columnar grains.
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