Strong sub-surface plastic deformation induced by high flux plasma in tungsten

被引：13
作者：
Terentyev, D. [1 ]
Dubinko, A. [1 ,2 ]
Bakaeva, A. [1 ,2 ]
De Temmerman, G. [3 ]
机构：
[1] SCK CEN, Inst Nucl Mat Sci, B-2400 Mol, Belgium
[2] Univ Ghent, Dept Appl Phys, B-9000 Ghent, Belgium
[3] ITER Org, CS 90 046, F-73067 St Paul Les Durance, France
来源：
FUSION ENGINEERING AND DESIGN | 2017年 / 124卷
关键词：
Tungsten; Plasma; Deformation; Dislocation; RETENTION; DEUTERIUM;
D O I：
10.1016/j.fusengdes.2017.02.043
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
We present experimental data obtained by post-examination of polycrystalline and single crystal tungsten exposed to high flux deuterium plasma (10(24) D/m(2)/s). The exposures were performed in the temperature range 450-600 K and followed by nuclear reaction analysis (NRA), transmission electron microscopy (TEM) and nano-indentation measurements. Direct TEM observation of the high dislocation density in the sub-surface of the plasma-exposed samples implies the occurrence of strong (and fast) local plastic deformation apparently enhanced by the availability of deuterium penetrating in the material. The sharp NRA profile, as usually measured after high flux low temperature plasma exposure, correlates well with the dislocation density evolution and hardness increase within 10-15 pm of the material subsurface. Importantly, the heavy plastic deformation was induced in similar amounts in both commercial pure polycrystalline and single crystal tungsten grades. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：405 / 409
页数：5
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