Transmission electron analysis of dislocation loops in T91 steels from MEGAPIE and MIRE irradiation experiments

Research output: Contribution to journalSpecial issue

Standard

Transmission electron analysis of dislocation loops in T91 steels from MEGAPIE and MIRE irradiation experiments. / Van Renterghem, Wouter; Terentyev, Dmitry; Konstantinovic, Milan.

In: Journal of Nuclear Materials, Vol. 506, 01.08.2018, p. 43-52.

Research output: Contribution to journalSpecial issue

Bibtex - Download

@article{9d1b2b2843024be281753e693bf62671,
title = "Transmission electron analysis of dislocation loops in T91 steels from MEGAPIE and MIRE irradiation experiments",
abstract = "T91 steel samples were irradiated in both a neutron and a neutron plus proton irradiation environments, and the resulting microstructure was studied using transmission electron microscopy. Three samples were irradiated with neutrons and protons to a cumulative dose of 0.88, 2.07, and 4.35 dpa at temperatures of 254 °C, 260 °C and 320-350 °C, respectively and two samples were irradiated with neutrons to 0.6 and 1 dpa, at a temperature of 290 C for comparison. Radiation induced dislocation loops were observed in both groups of samples. In all samples irradiated up to 1 dpa, irrespective of irradiation conditions, dislocation loops were segregated near the line dislocations, forming a clear heterogeneous distribution. In the high dose sample, on the other hand, they were uniformly distributed over the grain interior and the middle dose sample showed a mixed character. Voids of similar average size were only observed in the middle and high dose samples, and their appearance seems to be correlated with the onset of homogeneous loop distribution. The observed defect properties are rationalized on the basis of modeling results.",
keywords = "Transmission electron microscopy, MEGAPIE, T91, irradiation defects",
author = "{Van Renterghem}, Wouter and Dmitry Terentyev and Milan Konstantinovic",
note = "Score=10",
year = "2018",
month = "8",
day = "1",
doi = "10.1016/j.jnucmat.2017.10.045",
language = "English",
volume = "506",
pages = "43--52",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",

}

RIS - Download

TY - JOUR

T1 - Transmission electron analysis of dislocation loops in T91 steels from MEGAPIE and MIRE irradiation experiments

AU - Van Renterghem, Wouter

AU - Terentyev, Dmitry

AU - Konstantinovic, Milan

N1 - Score=10

PY - 2018/8/1

Y1 - 2018/8/1

N2 - T91 steel samples were irradiated in both a neutron and a neutron plus proton irradiation environments, and the resulting microstructure was studied using transmission electron microscopy. Three samples were irradiated with neutrons and protons to a cumulative dose of 0.88, 2.07, and 4.35 dpa at temperatures of 254 °C, 260 °C and 320-350 °C, respectively and two samples were irradiated with neutrons to 0.6 and 1 dpa, at a temperature of 290 C for comparison. Radiation induced dislocation loops were observed in both groups of samples. In all samples irradiated up to 1 dpa, irrespective of irradiation conditions, dislocation loops were segregated near the line dislocations, forming a clear heterogeneous distribution. In the high dose sample, on the other hand, they were uniformly distributed over the grain interior and the middle dose sample showed a mixed character. Voids of similar average size were only observed in the middle and high dose samples, and their appearance seems to be correlated with the onset of homogeneous loop distribution. The observed defect properties are rationalized on the basis of modeling results.

AB - T91 steel samples were irradiated in both a neutron and a neutron plus proton irradiation environments, and the resulting microstructure was studied using transmission electron microscopy. Three samples were irradiated with neutrons and protons to a cumulative dose of 0.88, 2.07, and 4.35 dpa at temperatures of 254 °C, 260 °C and 320-350 °C, respectively and two samples were irradiated with neutrons to 0.6 and 1 dpa, at a temperature of 290 C for comparison. Radiation induced dislocation loops were observed in both groups of samples. In all samples irradiated up to 1 dpa, irrespective of irradiation conditions, dislocation loops were segregated near the line dislocations, forming a clear heterogeneous distribution. In the high dose sample, on the other hand, they were uniformly distributed over the grain interior and the middle dose sample showed a mixed character. Voids of similar average size were only observed in the middle and high dose samples, and their appearance seems to be correlated with the onset of homogeneous loop distribution. The observed defect properties are rationalized on the basis of modeling results.

KW - Transmission electron microscopy

KW - MEGAPIE

KW - T91

KW - irradiation defects

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/32721765

U2 - 10.1016/j.jnucmat.2017.10.045

DO - 10.1016/j.jnucmat.2017.10.045

M3 - Special issue

VL - 506

SP - 43

EP - 52

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

ER -

ID: 4828076