Irradiation effects in tungsten-copper laminate composite

被引：31
作者：
Garrison, L. M. [1 ]
Katoh, Y. [1 ]
Snead, L. L. [1 ,2 ]
Byun, T. S. [1 ,3 ]
Reiser, J. [4 ]
Rieth, M. [4 ]
机构：
[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
[2] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA
[3] Pacific Northwest Natl Lab, Richland, WA 99352 USA
[4] Karlsruhe Inst Technol, Karlsruhe, Germany
来源：
JOURNAL OF NUCLEAR MATERIALS | 2016年 / 481卷
关键词：
Plasma-facing material; Laminate composite; Fusion material; Tungsten; Neutron irradiation; STRUCTURAL DIVERTOR APPLICATIONS; NEUTRON-IRRADIATION; MICROSTRUCTURAL EVOLUTION; TRANSMUTATION ELEMENTS; ELASTIC-MODULUS; ALLOYS; FOIL; INDENTATION; TEMPERATURE; HARDNESS;
D O I：
10.1016/j.jnucmat.2016.09.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Tungsten-copper laminate composite has shown promise as a structural plasma-facing component as compared to tungsten rod or plate. The present study evaluated the tungsten-copper composite after irradiation in the High Flux Isotope Reactor (HFIR) at temperatures of 410-780 degrees C and fast neutron fluences of 0.02-9.0 x 10(25) n/m(2), E > 0.1 MeV, 0.0039-1.76 displacements per atom (dpa) in tungsten. Tensile tests were performed on the composites, and the fracture surfaces were analyzed with scanning electron microscopy. Before irradiation, the tungsten layers had brittle cleavage failure, but the overall composite had 15.5% elongation at 22 degrees C. After only 0.0039 dpa this was reduced to 7.7% elongation, and no ductility was observed after 0.2 dpa at all irradiation temperatures when tensile tested at 22 degrees C. For elevated temperature tensile tests after irradiation, the composite only had ductile failure at temperatures where the tungsten was delaminating or ductile. (C) 2016 Elsevier B.V. All rights reserved.
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收藏
页码：134 / 146
页数：13
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