Carbides Evolution in a Ni-16Mo-7Cr Base Superalloy during Long-Term Thermal Exposure

The effect of long-term thermal exposure on the carbide evolution in a Ni-16Mo-7Cr base superalloy was investigated. The results show that M(12)C carbides are mainly precipitated on the grain boundaries during thermal exposure, and the primary massive M(6)C carbides can be completely transformed to...

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Detalles Bibliográficos
Autores principales: Han, Fenfen, Jiang, Li, Ye, Xiangxi, Lu, Yanling, Li, Zhijun, Zhou, Xingtai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Letter
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5459024/
https://www.ncbi.nlm.nih.gov/pubmed/28772881
http://dx.doi.org/10.3390/ma10050521
Descripción
Sumario:The effect of long-term thermal exposure on the carbide evolution in a Ni-16Mo-7Cr base superalloy was investigated. The results show that M(12)C carbides are mainly precipitated on the grain boundaries during thermal exposure, and the primary massive M(6)C carbides can be completely transformed to M(12)C carbides in situ at temperatures above 750 °C for long-term thermal exposure. The transformation from M(6)C carbides to M(12)C carbides is attributed to the release of C atoms from M(6)C, which results in the morphology changes of massive carbides, and stabilization of the sizes of M(12)C carbides precipitated on the grain boundaries.

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