科研之友
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摘要
An experimental Co-base superalloy was designed from the Ni-base system by exchange of Ni and Co concentrations. The alloy consist of a Co-matrix ( phase) strengthened by cuboidal precipitates Co-3(Al,X) ( phase). The -solvus temperature is 1005 degrees C. [001] single crystals of this alloy were solidified and tested for tension at different temperatures up to 1000 degrees C. It was found that the Co-base alloy has a much lower yield stress than a corresponding Ni-base alloy, but a much higher ductility. The partitioning behaviour of the alloying elements in the Co-base alloy and the deformation mechanisms were investigated by scanning and transmission electron microscopy.
- 出版日期2015-6
