Refine your search�ソスF     
Report No.
 - 

Effects of helium on irradiation response of reduced-activation ferritic-martensitic steels; Using nickel isotopes to simulate fusion neutron response

Kim, B. K.*; Tan, L.*; Sakasegawa, Hideo   ; Parish, C. M.*; Zhong, W.*; Tanigawa, Hiroyasu*; Kato, Yutai*

Understanding the effects of helium on microstructures and mechanical properties of reduced-activation ferritic-martensitic steels is important to use of these steels in fusion reactor structures. 9Cr-2WVTa steels were doped with $$^{58}$$Ni and $$^{60}$$Ni isotopes at 2 weight percent to control the rate of transmutation helium generation. The samples were irradiated in the High Flux Isotope Reactor. Transmission electron microscopy revealed a variety of precipitates and the radiation-induced dislocation loops and cavities (voids or helium bubbles). Tensile tests of the irradiated samples at the irradiation temperatures showed radiation-hardening at 300$$^{circ}$$C and radiation-softening at 400$$^{circ}$$C. Analysis indicates that the hardening primarily originated from the loops and cavities. The $$^{58}$$Ni-doped samples had greater strengthening contributions from loops and cavities, leading to higher hardening with lower ductility than the $$^{60}$$Ni-doped samples. The greater helium production of $$^{58}$$Ni did not show pronounced reductions in ductility of the samples.

Accesses

:

- Accesses

InCites™

:

Percentile:17.78

Category:Materials Science, Multidisciplinary

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.