In Situ SEM Investigation of Tensile Fracture Process of Fe-25Cr-35Ni Based Superalloy

Jing Feng Guo; Ren Gen Xu; Li Zhao; Wen Zhu Shao; Lian Jie Qin

doi:10.4028/www.scientific.net/AMR.279.39

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 279In Situ SEM Investigation of Tensile Fracture...

In Situ SEM Investigation of Tensile Fracture Process of Fe-25Cr-35Ni Based Superalloy

Abstract:

Initiation and propagation of micro cracks in the Fe-25Cr-35Ni based superalloy were observed and investigated through in situ tensile test in SEM using a single-edge notched specimen. The results show that the micro crack sources may easily occur with one of those, the second phase particles and matrix interface, and the stress concentration region. The micro-cracks which propagated at first for those that are perpendicular to the tensile load would be growing up and connected mutual with the increase of external stress until forming the main crack. While the length of the mail crack enlarged enough in the specimen, it become instable for the main cracks and the fracture occurred rapidly.

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Periodical:

Advanced Materials Research (Volume 279)

Pages:

39-43

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.279.39

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Online since:

July 2011

Authors:

Jing Feng Guo, Ren Gen Xu, Li Zhao, Wen Zhu Shao, Lian Jie Qin

Keywords:

Fe-25Cr-35Ni Based Superalloy, In Situ Tensile Test, Microcrack

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