This title appears in the Scientific Report :
2005
Please use the identifier:
http://dx.doi.org/10.1016/j.jnucmat.2004.09.076 in citations.
Ductility recovery in structural materials for spallation targets by post-irradiation annealing
Ductility recovery in structural materials for spallation targets by post-irradiation annealing
Low temperature irradiation embrittlement is one of the major criteria to determine the lifetime of spallation. targets. Embrittlement is especially high at low service temperatures, e.g. 250 degrees C in liquid-mercury sources. It was the aim of the present study to investigate the effect of post-i...
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Personal Name(s): | Chen, J. |
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Jung, P. / Rödig, M. / Ullmaier, H. / Bauer, G. S. | |
Contributing Institute: |
Streumethoden; IFF-ISM |
Published in: | Journal of nuclear materials, 343 (2005) S. 227 - 235 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2005
|
Physical Description: |
227 - 235 |
DOI: |
10.1016/j.jnucmat.2004.09.076 |
Document Type: |
Journal Article |
Research Program: |
Kondensierte Materie |
Series Title: |
Journal of Nuclear Materials
343 |
Subject (ZB): | |
Publikationsportal JuSER |
Low temperature irradiation embrittlement is one of the major criteria to determine the lifetime of spallation. targets. Embrittlement is especially high at low service temperatures, e.g. 250 degrees C in liquid-mercury sources. It was the aim of the present study to investigate the effect of post-irradiation annealing on the mechanical properties of irradiated structural materials. The specimens used were obtained from spent target components of operating spallation facilities (Los Alamos Neutron Science Center, LANSCE, and the Spallation Neutron Source at Rutherford-Appleton Laboratory, ISIS). The investigated materials include a nickel-based alloy (IN718), an austenitic stainless steel (AISI 304L), a martensitic stainless steel (DIN 1.4926) and a refractory metal (Ta) which experienced 800 MeV proton irradiation to fluences of several 1025 p/m(2). The specimens were annealed from 300 degrees C to 700 degrees C for 1 to 10 h, respectively, and their mechanical property changes were subsequently investigated at room temperature and 250 degrees C by tensile testing and fracture surface analysis conducted by scanning electron microscopy (SEM). The results showed that the ductility recovered to a large degree in 304L and DIN 1.4926 materials while their strength remained almost unchanged. Especially for DIN 1.4926, the ductility recovery is remarkable already at 400 degrees C. Together with its favorable thermomechanical properties, this makes martensitic steel a candidate for structural materials of spallation targets. (c) 2005 Elsevier B.V. All rights reserved. |