Microstructural evolution of a nickel-base single-crystal superalloy during high-temperature homogenisation

被引：4
|
作者：
Li, Xiangwei [1 ]
Ding, Rengen [1 ]
Wen, Donghui [1 ]
Wang, Yao [1 ]
Chu, Mingqiang [1 ]
Wang, Li [3 ]
Zhang, Peng [1 ]
Zhang, Shuyan [1 ,2 ]
机构：
[1] Ctr Excellence Adv Mat, Dongguan 523808, Peoples R China
[2] Songshan Lake Lab Mat Sci, Dongguan 523808, Peoples R China
[3] Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2020年 / 36卷 / 18期
基金：
中国国家自然科学基金;
关键词：
Superalloys; homogenisation; incipient melting; segregation; TCP phase;
D O I：
10.1080/02670836.2020.1852514
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Microstructural evolution of a nickel-base single-crystal superalloy during homogenisation at ultra-high temperature has been investigated using scanning electron microscope and electron probe microanalyzer. The results show that incipient melting occurs and all gamma/gamma ' eutectics are re-melted into liquid after 1 h homogenisation at 1350 degrees C. The volume fraction of IM decreases gradually with increasing homogenisation time. The IM disappears totally after 14 h homogenisation. Moreover, the formation of the TCP phase is suppressed during long-term thermal exposure at 1100 degrees C for the reduction of element segregation, especially the segregation of refractory element Re was reduced during ultra-high-temperature homogenisation. The microstructure evolution of IM was discussed based on the element diffusion during homogenisation.
引用
收藏
页码：1936 / 1942
页数：7
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