Zhuangqi HU Huaming WANG Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
110015
,
ChinaY.Murata M.Morinaga Toyohashi University of Technology
,
Toyohashi
,
Aichi
,
440 Japan
材料科学技术（英）
The solidification microstructures and solute segregation of a newly developed hot corrosion resistant single-crystal Ni-base superalloy were investigated with a zone-melting and ultra-high thermal gradient unidirectional solidification apparatus.Compared with the microstructures solidified at conventional low thermal gradient conditions,the dendrite arm spacings,the interdendritic microporosity and γ/γ' eutectic,and the severity of solute segregation of the single-crystal superalloy solidified at ultra-high thermal gradient conditions were considerably reduced.It was shown that the microstructure solidified under ultra-high thermal gradient condition is ideal for the full exploitation of the excellent property potentials of single-crystal superalloys.
关键词:
single-crystal superalloy
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null
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