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

页码：1936 / 1942

页数：7

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