Title of article
In-situ observation of the effect of the precipitate/matrix interface on the evolution of dislocation structures in CLAM steel during irradiation
Author/Authors
Zhao، نويسنده , , M.Z and Liu، نويسنده , , P.P. and Bai، نويسنده , , J.W. and Zhu، نويسنده , , Y.M. and Wan، نويسنده , , F.R. and Ohnuki، نويسنده , , S. and Zhan، نويسنده , , Q.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2014
Pages
7
From page
2759
To page
2765
Abstract
The key factor that affects the irradiation resistance of a material is its structure such as grain size and precipitates. Two types of China Low Activation Martensitic (CLAM) steels with a different number density of MC phase were pre-ion implanted and subsequently irradiated by electrons using ultra-high voltage electron microscope (HVEM). The effect of MC phase on the growth behavior of dislocation loops and the stability of pre-existing precipitates were investigated in situ and this may give some hints on the way to increase the ability against irradiation damage. The results show that a high number density of the fine MC phase improves the strength of the material and also helps to inhibit the fast growth of dislocation loops. The interface between the precipitate and the matrix acts as an effective sink to trap radiation induced point defects, which can possibly result in an improvement of irradiation resistance to some extent. However, the coarsening of precipitates because of radiation enhanced diffusion is another issue that needs to be seriously considered when developing a nuclear material.
Keywords
structure , Precipitate , electron irradiation , Dislocation loop , Clam
Journal title
Fusion Engineering and Design
Serial Year
2014
Journal title
Fusion Engineering and Design
Record number
2370906
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