Xenon Ion Irradiation Effects on a Ni-Base Ni-17Mo-7Cr Alloy

He Fei Huang; De Hui Li; Long Yan

doi:10.4028/www.scientific.net/AST.94.69

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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 94Xenon Ion Irradiation Effects on a Ni-Base...

Xenon Ion Irradiation Effects on a Ni-Base Ni-17Mo-7Cr Alloy

Abstract:

The irradiation effects of a new nickel-base alloy (Ni-17Mo-7Cr) has been investigated by using 1 MeV Xe²⁰⁺ and 7 MeV Xe²⁶⁺ ions irradiation with displacement damage range from 0.33 to 6.6 dpa. The transmission electron microscopy and nanoindentation were employed to study respectively the microstructural evolution of thin-foil specimens and nanoindentation hardness changes of bulk specimens. In case of 0.33 dpa, high number density of nano-scale black spots were observed in thin-foil specimens. High-resolution transmission electron microscopy images revealed that these black spots are some rounded solute clusters and dislocation loops. As far as the ion dose of 3.3 and 6.6 dpa, the black spots were replaced with linear-like defects which were proved to be some Ni, Mo and Cr-enrichment regions. In addition, nanoindentation results for bulk specimens showed an evident hardening phenomenon in irradiated Ni-17Mo-7Cr alloys, compared to the unirradiated specimen. The irradiation induced defects may be responsible for the hardening of Ni-17Mo-7Cr alloys.

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Periodical:

Advances in Science and Technology (Volume 94)

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69-74

DOI:

https://doi.org/10.4028/www.scientific.net/AST.94.69

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Online since:

October 2014

Authors:

He Fei Huang, De Hui Li, Long Yan*

Keywords:

Hardening, Ion Irradiation, Irradiation Induced Defects, Nanoindentation Test

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References

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