Effect of irradiation mode on the microstructure of self-ion irradiated ferritic-martensitic alloys

被引：65
|
作者：
Getto, E. [1 ]
Jiao, Z. [1 ]
Monterrosa, A. M. [1 ]
Sun, K. [2 ]
Was, G. S. [1 ,2 ]
机构：
[1] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Dept Mat Sci Engn, Ann Arbor, MI 48109 USA
来源：
JOURNAL OF NUCLEAR MATERIALS | 2015年 / 465卷
关键词：
Void swelling; Ferritic-martensitic alloys; Radiation effects; Raster-scanned; Defocused; EMULATION;
D O I：
10.1016/j.jnucmat.2015.05.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructures of ferritic-martensitic alloys HT9 and T91 were characterized following 5 MeV Fe++ ion irradiation to 140 displacements per atom (dpa) at 440 degrees C with either a raster-scanned or defocused beam. Alloys were pre-implanted with 0-100 appm He and then subjected to either a raster-scanned beam or a defocused beam. Relative to the defocused beam, a raster-scanned beam suppressed microstructural evolution, evidenced by decreased diameter and number densities of voids, loop and precipitates, which lead to decreased void swelling, precipitate volume fraction and total dislocation loop line density. These results were consistent with the Fully Dynamic Rate Theory (FDRT) model which predicts that raster-scanning should lead to a decrease in defect population and suppression of nucleation and growth processes. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：116 / 126
页数：11
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