This title appears in the Scientific Report :
2006
Please use the identifier:
http://dx.doi.org/10.1016/j.jnucmat.2006.05.004 in citations.
Bending tests on T91 samples implanted with 0.25 at.% helium: Experiments and mechanical analysis
Bending tests on T91 samples implanted with 0.25 at.% helium: Experiments and mechanical analysis
In order to investigate helium effects on the fracture properties of martensitic mod 9Cr-1Mo (T91) steel, miniature Charpy specimens were implanted at 250 degrees C in the notch region to 0.25 at.% helium using a degraded 34 MeV He-3 ion beam and subsequently submitted to static bending tests at roo...
Saved in:
Personal Name(s): | Henry, J. |
---|---|
Vincent, L. / Averty, X. / Marini, B. / Jung, P. | |
Contributing Institute: |
Streumethoden; IFF-ISM |
Published in: | Journal of nuclear materials, 356 (2006) S. 78 - 87 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2006
|
Physical Description: |
78 - 87 |
DOI: |
10.1016/j.jnucmat.2006.05.004 |
Document Type: |
Journal Article |
Research Program: |
Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) Kondensierte Materie |
Series Title: |
Journal of Nuclear Materials
356 |
Subject (ZB): | |
Publikationsportal JuSER |
In order to investigate helium effects on the fracture properties of martensitic mod 9Cr-1Mo (T91) steel, miniature Charpy specimens were implanted at 250 degrees C in the notch region to 0.25 at.% helium using a degraded 34 MeV He-3 ion beam and subsequently submitted to static bending tests at room temperature. For the six implanted specimens, a 'pop-in' phenomenon, which is an arrested unstable crack extension, was systematically recorded during testing. In the implanted zones of the samples, the fracture mode was fully brittle with both intergranular and cleavage fracture, whereas for unimplanted samples tested at -170 degrees C, the fracture mode was found to be 100% cleavage. Finite element simulations of the tests performed on unimplanted and implanted specimens were also carried out to determine stress and strain fields at the onset of crack propagation. Based on these computations, the fracture toughness of implanted T91 was tentatively evaluated using the Beremin model of the local approach to brittle fracture. (c) 2006 Elsevier B.V. All rights reserved. |