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27 April 2024 |
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Study of helium irradiation induced hardening in MNHS steel | | J. Wang
; Z.G. Wang
; E.Q. Xie
; N. Gao
; M.H. Cui
; T.L. Shen
; K.F. Wei
; C.F. Yao
; J.R. Sun
; Y.B. Zhu
; L.L. Pang
; D. Wang
; H. P. Zhu
; Y.Y. Du
; | | Date: |
25 Mar 2015 | | Abstract: | A recently developed reduced activation ferritic/martensitic steel MNHS was
irradiated with 200keV He ions to a fluence of 1E21ions/m^2 at 450 celsius
degree and 1E20ions/m^2 at 300 celsius degree and 450 celsius degree,
respectively. The irradiation hardening of the steel was investigated by
nanoindentation measurements combined with transmission electron microscopy
(TEM) analysis. Dispersed barrier-hardening (DBH) model was applied to predict
the hardness increments based on TEM analysis. The predicted hardness
increments are consistent with the values obtained by nanoindentation tests. It
is found that dislocation loops and He bubbles are hard barriers against
dislocation motion and they are the main contributions to He
irradiation-induced hardening of MNHS steel. The obstacle strength of He
bubbles is stronger than the obstacle strength of dislocation loops. | | Source: | arXiv, 1503.8088 | | Services: | Forum | Review | PDF | Favorites | |
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