Effects of helium on ductile-brittle transition behavior of reduced-activation ferritic steels after high-concentration helium implantation at high temperature

被引：38
|
作者：
Hasegawa, A. [1 ]
Ejiri, M. [1 ]
Nogami, S. [1 ]
Ishiga, M. [1 ]
Kasada, R. [2 ]
Kimura, A. [2 ]
Abe, K. [1 ]
Jitsukawa, S. [3 ]
机构：
[1] Tohoku Univ, Dept Quantum Sci & Energy Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan
[2] Kyoto Univ, Inst Adv Energy, Kyoto 6110011, Japan
[3] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan
来源：
JOURNAL OF NUCLEAR MATERIALS | 2009年 / 386-88卷
关键词：
9CR MARTENSITIC STEELS; TENSILE; CREEP;
D O I：
10.1016/j.jnucmat.2008.12.102
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of He on the fracture behavior of reduced-activation ferritic/martensitic steels, including oxide dispersion-strengthened (ODS) steels and F82H, was determined by characterizing the microstructural evolution in and fracture behavior of these steels after He implantation up to 1000 appm at around 550 degrees C. He implantation was carried out by a cyclotron with a beam of 50 MeV alpha-particles. In the case of F82H, the ductile-to-brittle transition temperature (DBTT) increase induced by He implantation was about 70 degrees C and the grain boundary fracture surface was only observed in the He-implanted area of all the ruptured specimens in brittle manner. By contrast, no DBTT shift or fracture mode change was observed in He-implanted 9Cr-ODS and 14Cr-ODS steels. Microstructural characterization suggested that the difference in the bubble formation behavior of F82H and ODS steels might be attributed to the grain boundary rupture of He-implanted F82H. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：241 / 244
页数：4
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